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Pressure reducing valves

• Guide of applications

2

PRESSURE REDUCING VALVES

CONTENTS

page

l The pressure reducing valve: Definition ___________________________________________________________________________________________________________________________3

l Water savings_____________________________________________________________________________________________________________________________________________________________________________________________3

l Pressure reducing valves or Regulators ?_______________________________________________________________________________________________________________________3

l WATTS, the inventor of the regulator __________________________________________________________________________________________________________________________________4

l How to choose the diameter of pressure reducing valves ?__________________________________________________________________________4

l Installation____________________________________________________________________________________________________________________________________________________________________________________________________5

l How to adjust a pressure reducing valve ? ____________________________________________________________________________________________________________________5

l Precautions __________________________________________________________________________________________________________________________________________________________________________________________________5

l Pressure gauge: the essential accessory _______________________________________________________________________________________________________________________6

l European standard EN 1567 and the brand NF___________________________________________________________________________________________________________6

l Sanitary Conformity (ACS / WRAS) _________________________________________________________________________________________________________________________________________6

l Pressure reducing valve, the WATTS INDUSTRIES expertise_______________________________________________________________________6

l Case of electrical hot water storage heater_________________________________________________________________________________________________________________7

l Case of tower blocks______________________________________________________________________________________________________________________________________________________________________7-8

l Applications Guide ________________________________________________________________________________________________________________________________________________________________________________9

l Product information sheets_________________________________________________________________________________________________________________________________________10 to 20

THE PRESSURE REDUCING VALVE: DEFINITION

This valve reduces the pressure of the water that goes through it, and is used to obtain a regulated and constant value at its outlet.

It is installed at the water mains (for a bungalow as for a flat). It protects the whole installation from problems due to excesspressure: noises in the pipes, water hammer, splashes, premature wear of household electrical appliances and taps.

The pressure reducing valves are completely automatic.

WATER SAVINGS

Water represents a major part of household budgets.

Not wasting it makes for real savings, but do you know that 30% of water used in a house is heated.

Less pressure means less water used, and therefore less energy consumed.

Through its low load losses, the WATTS INDUSTRIES pressure reducing valves allow the obtaining of a normal flow ratewhen water in drawn in several places simultaneously.

The toilet flushing is less noisy and the taps no longer splash.

Example with a tap running for 10 minutes.

A considerable amount of the distributed water is directly dumped into the sewer without even having been truly used (see illustration above).Reducing the pressure, all in obtaining comfort in use, allows for real savings.

In all cases, make a regular check of the condition of the tap and toilet flusher seals: a leak consumes a lot more water thanyou think ! (sometimes up to 3 m3 per day for a private household).

PRESSURE REDUCING VALVES OR REGULATORS ?

We use the standardised official term « REDUCER », but a pressure reducing valve is highly sensitive to upstream pressurevariations, and regulates badly without water flowing (without drawing).

The WATTS INDUSTRIES direct action pressure reducing valves (PRECISIO, U5B, REGLEAU) regulate the downstreampressure as well with or without water flowing (without drawing). The downstream pressure only varies by 8% from the upstream pressure variation. These appliances are therefore PRESSURE REGULATORS.


3

WATTS, THE INVENTOR OF THE REGULATOR

• From this date, most regulators made in the world were inspired by or copied this format.

The unique design of the WATTS pressure reducing valve makes it insensitive to scale or impurities, and needs nomaintenance.

The diaphragm, spring, seat and flap valve are largely dimensioned for precise and constant regulation all in allowing highflow rates.

A corrosion-free spring (1) with a large spiral and highly sensitive: it guarantees precise adjustment. The pressure control is within the1,5 to 5,5 bar range.

A high-temperature diaphragm (2) and a flap valve (3): resist high temperatures (up to 80°C).

A stainless steel seat (4): an exclusivity that protects from wear and water aggressivity. Give a long-life guarantee.

A single-unit body in non-dezincificable brass (5) (DZR): highly robust, this metal is resistant to corrosion and satisfies thenew health standards on the compatibility of materials in contactwith drinking water.

A yoke and flap valve assembly (6): single-piece moving part in non-dezincificable brass (DZR), the yoke includes a flap valve (3)that is largely dimensioned, allowing higher performanceto standard requirements.

PRECISIO, U5B and REGLEAU use this direct action technique, with yoke and diaphragm.

HOW TO CHOOSE THE DIAMETER OF PRESSURE REDUCING VALVES ?

Practical rule: the pressure reducing valve is generally chosen according to the diameter of the installed pipe, provided, of course, that the latter is of the right size.

The choice of pipe diameters must follow the rules of the trade and must conform to the standards in force.

Refer to the flow rate curves of each pressure reducing valve, given in the technical documents.

4


• In 1876: Invention, manufacturing and marketing of the first regulator.

It was somewhat complicated, took up a lot of space (nearly 2 metres high), but it worked.

• 1930: A half century had already gone by.Everything was designed – the principle of the direct action regulator valve with diaphragm operating the flap valve, the interior shape, the general look.

INSTALLATION

WATTS pressure reducing valves may be installed in all positions.They are generally installed directly after the water meter, and thus protect the whole installation.

PRECISIO has 2 side connections and not a single one under the appliance unlike similar valves offered in the market.

Advantage of a pressure gauge connection on the front: when 2 tubes are parallel with the wall, one above the other.

HOW TO ADJUST A PRESSURE REDUCING VALVE ?

THE ADJUSTMENT MUST BE DONE WITHOUT FLOW – NO DOWNSTREAM OUTFLOW.

The WATTS INDUSTRIES pressure reducing valves are factory preset at 3 bar. They remain adjustable within a 1,5 to 5,5 bar range.

• To increase the pressure, tighten the adjusting screw (clockwise as you look at the screw from above).

• To reduce the pressure, undo the adjusting screw (anticlockwise as you look at the screw from above), slightly open a tap for a moment, close again, then tighten the screw again until you obtain the desired pressure.

Two 1/4" gauge ports are located on each side of the valve when a pressure gauge is required to be fitted.

PRECAUTIONS

WATTS INDUSTRIES direct action water pressure reducing valves are insensitive to scale or impurities, and need no maintenance or particular precautions provided that they are installed according to the rules of the trade.

However, if there is a risk of back pressure or water hammer in the downstream circuit, you are advised to protect the pressure reducing valve by a non-return valve placed immediately downstream.

The pressure gauge

is easily screwed

onto one of the

two side connections.

The tube underneath makes it impossible to mount the pressure gauge directly on most pressure reducing valves on the market.


5

Typical connection conforming to health and technical requirements:

Faster and more practical, the multi-threaded models 2286315 or 2286216 are installeddirectly after the water meter and/or after the anti-pollution non-return valve.

Pressure reducing valve NFPRECISIO

multi-threaded M 3/4” - F 1/2”

Anti-pollution non-return valve NF

Water meter

When opening the downstream tap (drawing), it isnormal to see the pressure drop: this is the load lossof the appliance.

This value is given in the appliance flow rate curves(see technical documents).

PRESSURE GAUGE: THE ESSENTIAL ACCESSORY

The pressure gauge allows direct reading of the pressure, and thus allows precise adjustment of the pressure reducing valve to local installation conditions.

WATTS INDUSTRIES designs, manufactures and markets a wide range of pressuregauges for buildings and industry.

Over the years, through the successive acquisition of FIMET and the German companyFörster & Rothmann, the WATTS INDUSTRIES group has become a key player in the European instrumentation market.

The pressure gauge should not remain under pressure – the installation of an isolatingvalve is recommended.

EUROPEAN STANDARD EN 1567 AND THE bRAND NF

The brand NF guarantees the observance of standards for using household electrical appliances and taps.

PRECISIO has the right to use the NF EN 1567 brand, and ensures user comfort and preservation of installations: by distributing a normal flow rate during simultaneous drawings, thanks to its low load loss.

PRECISIO reduces the noise of running water. It facilitates the adjustment of mixers, by reducing the water hammer effectand avoiding rattling and vibrations in the pipes, characteristic phenomena of excessive pressure.

PRECISIO helps towards saving water by avoiding waste (leakage from pipes, taps and toilet flushers).Through its design, it keeps its characteristics in time regardless of the water quality.

SANITARY CONFORMITY (ACS / WRAS)

These certificates assure the sanitary approvals - according to local requirements - A.C.S. (F) and WRAS (GB).

PRESSURE REDUCING VALVES, THE WATTS INDUSTRIES EXPERTISE

WATTS, inventor of the modern pressure reducing valve concept, designs and manufactures a complete range for all needs.

WATTS pressure reducing valves offer:

- The best for you and your customers, because depending on quality products ensures peace of mind.

- Easy installation: PRECISIO and REGLEAU are interchangeable with the main pressure reducingvalves on the market. They can be installed in all positions.

- Savings: WATTS pressure reducing valves are sold at a competitive price. They ensure real water savings for your customers. They pay for themselves quickly.

- Conformity to standards, the quality of the materials used, the NF brand, the health conformity attestation, etc. are all guarantees for your installations.

- Reliability: manufacturing under quality assurance ISO 9001 (version 2008) in our plant at HAUTVILLERS OUVILLE (80 – Somme).

- By experience acquired on the job, the success of REDUFIX is due to installers insisting on this product,with more than 20 years on the market.

6


CASE OF TOWER bLOCKS:

Case No. 1: 6-storey building - « Normal » water mains pressure: 6 bar - Desired pressure in each flat: 3 bar.

In the case of a residential building, it is advisable to install a pressure reducing valve at the input of each flat, and not a centralised pressure reducing valve at the bottom of the building.

Why ?: we should consider a height of 3 metres for each storey, a load loss per storey of 0.3 bar.

Therefore, if you install a single central pressure reducing valve at the bottom of the building adjusted to 3 bar, the first storeys will be supplied at the right pressure, but the more you go up the storeys, the more the pressure will drop.

For example, the 6th floor will have only 1.4 bar of available pressure, too low.

It is therefore necessary to install the same pressure reducing valve, adjusted to 3 bar, at the entry of each flat.

hot waterstorage heater

Dielectric insulating connection

Pressure reducing valveREDUFIX

Safety groupSFR 3/4"

DeflectorDrainage

Trap funnel kit

ThermostaticMixing valves MMV-C

Mixed water

Hot water

Cold water inlet

Cold water inlet


7As the water temperature increases, the pressure also riseswithin the heater chamber (water expansion).

For safety reasons, this pressure must be limited to a valueunder the safety pressure of the tank. This function is ensu-red by the safety group, which is set at 7 bar (standard NF-D 36401 - EN1487).

An aggravating factor – the consumption of water during thenight drops considerably, which has the consequence of in-creasing pressure in the public drinking water network.

Now, it is generally during the night that the heating periodis triggered (case of electric meters with off-peak time rates).

Thus the heating of the water adds to the increase of watermains pressure, and causes the pressure in the hot waterstorage heater to reach the safety valve set-point, producing a water outflow higher than water expansion.

To avoid this water outflow (drinking and heated), it is necessary to install a pressure reducing valve, that will protect the immersion tank from excess pressure.

REDUFIX is an especially designed pressure reducing valvefor this function.

It is a good-looking design, very discreet and compact, per-fect for built-in under counter electrical immersion heaters.

CASE OF ELECTRICAL HOT WATER STORAGE HEATER:

Case No. 2: Building of more than 6-storeys - « High » water mains pressure: 10 bar -Desired pressure in each flat: 3 bar.

In the case of a residential building where the mains water pressure is very high, you are advised to install on the maininlet a pressure reducing valve of a larger diameter, which will firstly reduce the pressure to 6 bar, and a pressure reducing valve adjusted to 3 bar at the entry of each flat.

The vertical columns are thus protested by the larger pressure reducing valve, and each level by a smaller pressurereducing valve to give a pressure of 3 bar.

Remark: For very high buildings, the highest storeys do not require the installation of a pressure reducing valve whenthe pressure is less than 3 bar.

Case No. 3: Building of more than 6-storeys - « Low » water mains pressure: 3 barDesired pressure in each flat: 3 bar.

In this case, the installation of a pressure booster is necessary.This will be adjusted to a value of 5 or 6 bar, the purpose being to obtain adequate pressure at all floors.

It is therefore necessary to install the same pressure reducing valve, adjusted to 3 bar, at the entry of each flat.

Remark: again, for very high buildings, the highest storeys do not require the installation of a pressure reducing valvewhen the pressure is less than 3 bar.

8



9To choose the most suitable products, follow the applications below.

Protecting electric hot water storage heaters

and household appliances

APPLICATION MODELPressuremaxi (bar)

15

15

15

15

25

15

25

25

20

20

16

16

25

25

1,5 to 5

1,5 to 5

1,5 to 4

1,5 to 4

1,5 to 5,5

1,5 to 4

1 to 7

1 to 7

1,5 to 5,5

1,5 to 5,5

1,5 to 6

1,5 to 6

1,5 to 5,5

1,5 to 5,5

Pressure settingrange (bar)

10

10

11

11

12 - 13

11

18 - 19

18 - 19

15

15

17

17

12 - 13

12 - 13

PagesDiametersavailables

Building and domestic installations

Collective installations

Industrial installations

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REDUFIX

REDUBAR

REDUFIX

REDUBAR

PRECISIO

REDUBLOC

REGLEAU

REGLEAU

DRVD

DRVD

PR500

PR500

PRECISIO

PRECISIO

�

Guide of applications

1/2” to 3/4”

1/2” to 3/4”

1/2” to 3/4”

1/2” to 3/4”

1/2” to 3/4”

16 1,5 to 5,5 14� REDUPRESS 1/2” to 3/4”

3/4”

15 1,5 to 4 11� REDUBLOC 3/4”

15 1,5 to 4 11� REDUBLOC 3/4”

16 1,5 to 5,5 14� REDUPRESS 1/2” to 3/4”

15 1,5 to 4 11� REDUBLOC 3/4”

1/2” to 3/4”

1/2” to 3/4”

1” to 3”

1” to 3”

DN 50 to DN 200

DN 50 to DN 200

DN 50 to DN 250

DN 50 to DN 250

Guide of applications

10


Pressure reducing valve with piston and diaphragm, is designed for protecting single appliance like hot water storage heaters and household appliances.

It is directly fitted upstream of the appliance that you want to protect or to water circuit inlets that you want to protect (kitchen, bathrooms, garden piping etc.).

Body in DZR brass, corrosion resistant.Finish: nickel plated.Diaphragm in NBR.Female 1/4” pressure gauge outlet.

• CompactTakes up less space, easier to fit, and is unobtrusive underneath hot water storage heaters.

• Any position The REDUFIX can be fitted in any position.

• Robust Once fitted you can forget it. The REDUFIX does not require any special maintenance.

• Silent The valve system design and types of seals used ensureoperation with no vibration and no rattling about.

• Specific discharge Discharge is appropriate to isolated appliances like washingmachines or hot water storage heaters. It performs a role inbetter thermostatic mixer control and controlled waterconsumption.

• Practical Its Female 1/4” pressure gauge port is located on the frontand not under the valve.

Max. inlet pressure: 15 bar. Max. temperature: 70°C.Factory preset at 3 bar (± 0,5) adjustable from 1,5 to 5 bar.

Approvals: WRAS (UK), ACS (F) ; (KIWA: art. no. 2282116and 2282118).

Pressure reducing valve REDUFIX

diameter presentation art. no.F/F 1/2” (15x21) box 2282000M/F 3/4” free union nut (20x27) box 2282210M/F 3/4” free union nut (20x27) under hull 2282211F 3/4” free union nut/M 3/4” (20x27) box 2282215M/M 3/4” (20x27) box 2282110M/M 3/4” and F/F 1/2” (double threaded) box 2282007

DN 15 compression fitting box 2282116DN 22 compression fitting box 2282118

Pressure drop diagram

Under the following conditions: 8 bar inlet, 3 bar outlet.

art. no. 2282210: special for safety group art. no.: 2282210 and 2282211

M 3/4”/F free union nut 3/4”

art. no.: 2282110 - M/M 3/4”

art. no.: 2282215F 3/4” free union nut/M 3/4”

art. no.: 2282007double threaded

M3/4” F1/2” - M3/4” F1/2”

art. no.: 2282000 - F/F 1/2”

art. no.: 2282118compression fitting 22 mm

art. no.: 2282116compression fitting 15 mm

± 0,31 kg

± 0,36 kg

± 0,36 kg

± 0,32 kg

± 0,32 kg

± 0,34 kg ± 0,38 kg


11

Compact pressure reducing valve.Redubar is an ideal pressure reducing valve for protectingelectric hot water storage heaters, household appliances and vending machines.

Internal mechanism in synthetic material to reduce the possibility of scaling.

• Factory preset at 3 bar ± 0,5 (2,5 to 3,5 bar) can be set from 1,5 to 4 bar.

• Maintenance free and robust device.• Brass body nickel plated and/or plain finished. • Slotted adjusting screw that can be turned with a flathead screwdriver.

art. no. 2282500 art. no. 2282501

Pressure reducing valve REDUbAR

Max. temperature: 70°C.

Max. inlet pressure: 15 bar.

diameter art. no. packagingMale/Female free nut 3/4” (20x27) special for safety group 2282500 40Multi-threaded Male 3/4” and Female 1/2” at inlet and outlet 2282501 40

Under the following conditions: 8 bar inlet3 bar outlet

art. no. 2282500: special for safety group and

electric hot water storage heater

Male/Female free nut 3/4” (20x27). Multi-threaded Male 3/4” and Female 1/2” at inlet and outlet.

Single device intended for water connection, combining 3 functions in one body.1. Isolating Valve2. Pressure reducing valve3. Approved controllable check valve

• Easy mounting.• Respect for standards.• Competitive price.• Reduced weight and dimension.• 3 times less time to install.• Simple construction ensuring reliability and longevity.

Pressure reducing valve factory set at 3 bar.The setting is adjustable between 1,5 and 4 bar.Controllable check valve approved.

REDUbLOC 3.1



Flow

rate

Head loss

37.5 mm 49 mm

i

ixaM

mm 59

18.5 mm

m

86.5 mm

mm 53

mm 5.35

water meter 3/4”M (20x27)

waterinlet

direct monting byunion free nut 3/4”

downstream: double threading M 3/4”- F 1/2”

check valvechecking plug

diameter art. no. packagingF 3/4” free nut (20x27) x M 3/4” / F 1/2” 2282900 25F 3/4” free nut (20x27) x M 3/4” / F 1/2” with checking pressure gauge 2282901 25

12


Pressure reducing valve with yoke and diaphragm.Reduce the water pressure without reduce the flow.Precisio M2 brings comfort by lowering the noise of watercirculation and respecting acoustic norms.Reliable and without maintenance. Non-dezincificable (DZR) brass body.Diaphragm and a high temperature yoke assembly. Stainless steel seat.The adjustment is reliable and precise thanks to the screw-and-nut system.Precisio is interchangeable with most market appliances.2 pressure gauge ports F 1/4” (8x13).Precisio M2 can be fitted in any position.

Pressure reducing valve PRECISIO M2

Max. inlet pressure: 25 bar.Adjustable: 1,5 to 5 bar.Delivered preset at 3 bar. Max. temperature: 80°C.

Standard NF approved EN 1567.

Female 3/4”

oror

Internal femaleDN 15x21 (1/2”)

PRECISIO multi-threaded (composite or brass cover) is issued with 2 reversible multi-threaded connectors with free nuts.

Male 1/2”

External maleDN 20x27 (3/4”)

* measured in relation to the support surface of the piping nozzle on which the joint is going to apply.

External maleDN 20x27 (3/4”)

Reversible

Internal femaleDN 15x21 (1/2”)

Male 1/2”Female 3/4”

MaleDN 15 - 1/2”

MaleDN 20 - 3/4”

FemaleDN 15 - 1/2”

FemaleDN 20 - 3/4”

MaleDN 151/2”

MaleDN 203/4”

FemaleDN 151/2”

FemaleDN 203/4”

UPSTREAM

DOWNSTREAM

154mmapprox.*

127mmapprox.

127mmapprox.

143mmapprox.*

127mmapprox.

100mmapprox.

100mmapprox.

117mmapprox.*

127mmapprox.

100mmapprox.

100mmapprox.

117mmapprox.*

143mmapprox.*

117mmapprox.*

117mmapprox.*

132mmapprox.*

± 0,796 kg ± 0,796 kg

± 0,796 kg± 0,796 kg

± 0,796 kg

± 0,796 kg

± 0,796 kg

± 0,796 kg± 0,729 kg ± 0,729 kg

± 0,729 kg ± 0,729 kg

± 0,864 kg ± 0,864 kg

± 0,864 kg ± 0,864 kg

art. no. 2286216

art. no. 2286200

art. no. 2286315

art. no. 2286300


13

diameter type art. no.F/F 3/4” (20x27) Precisio M2 F/F 3/4” 2286300Multi-threaded 3/4” - 1/2” + 2 reversible connectors Precisio M2 multi-threaded 2286315

F/F 3/4” (20x27) Precisio brass F/F 3/4” 2286200Multi-threaded 3/4” - 1/2” + 2 reversible connectors Precisio brass multi-threaded 2286216

Hea

d lo

ss (b

ar)

Flow (L/min)

Precisio multi-threadedconnected in F/F 1/2”

Precisio F/F 3/4” and multi-threaded connected in M/M 3/4”

Precisio M2multi-threaded 3/4”-1/2”

art. no.: 2286315

Precisio M2 FF 3/4”

art. no.: 2286300

Precisio multi-threaded 3/4”-1/2”

art. no.: 2286216

± 0,864 kg

± 1,230 kg

± 0,654 kg

± 1,020 kgPrecisio FF 3/4”

art. no.: 2286200

issued with 2reversibleconnectors

issued with 2reversibleconnectors

art. no. 2286300 art. no. 2286216art. no. 2286200art. no. 2286315

14


Pressure reducing valve with piston and diaphragm.

Ideal pressure reducing valve for domestic, commercial andindustrial installations:Individual water supply for low-cost building sites (flat, bungalow, etc.).


Two 1/4" (8x13) side connections for pressure gauge.

Body: corrosion resistant DZR brass, nickel finished.

Diaphragm in EPDM.

Adjustment of setting by screw on the top of the cover.

SPECIAL LOW PRESSURE MODEL*:Adjustable: 0,5 to 2,5 bar.Max. inlet pressure: 8 bar.Flow: 25 L/min. under 0,5 bar.

Pressure reducing valve REDUPRESS


Adjustable: 1,5 to 5,5 bar.

diameter type of pressure art. no.F/F 1/2” standard pressure 2281100F/F 1/2” low pressure 2281106F/F 3/4” standard pressure 2281116F/F 3/4” low pressure 2281113M/M 3/4” standard pressure 2281015F/F 1/2” with pressure gauge standard pressure 2281101F/F 3/4” with pressure gauge standard pressure 2281117M/M 3/4” with pressure gauge standard pressure 2281016Pressure gauge 0 to 10 bar 2266206

F/F 3/4”

M/M 3/4”

F/F 1/2”Pressure drop diagram for standard REDUPRESS 1,5 to 5,5 bar

*

*


15

Pressure reducing valve with disc-yoke and diaphragm.

• Yoke and diaphragm assembly: cast solid moving part highlysensitive spring and large diaphragm permits accurate adjustment and excellent performances.

• Stainless spring with large coils and high sensitivity: it guarantees a precise adjustment.

• Diaphragm and valve high temperature: resisting high temperatures (up to 70°C).

• Stainless steel seat: an exclusive design which protects thevalve from the aggressive wear of water. A guarantee of longevity.

diameter A (mm) B (mm) C (mm) type art. no.F/F 1” (26x34) 121 54 165 Regleau G.C. 2228602F/F 1”1/4 (33x42) 127 70 172 Regleau G.C. 2228603F/F 1”1/2 (40x49) 171 70 251 Regleau G.C. 2228604F/F 2” (50x60) 203 86 273 Regleau G.C. 2228605F/F 2”1/2 By-pass (66x76) 200 73 273 Regleau G.C. 2228616F/F 3” By-pass (80x90) 267 105 324 Regleau G.C. 2228617

Pressure reducing valve REGLEAU G.C.


Max. inlet pressure: until 20 bar.

Adjustable: 1,5 to 5,5 bar.Delivered preset at 3 bar.

Flow: until 40 m3/h.

Assembly any position.

For hot or cold water.

Seat: stainless steel. Body: bronze.

Models 2”1/2 and 3”Models 1” and 1”1/4

Models 1”1/2 and 2”

16


HYDROBLOC is a cold water or hot water supply unit incorporating 5 functions:- Direct assembly below meter by free nut.- Isolating valve built into spherical brass valve.- Testable antipollution check valve approved by WRAS,KIWA, DVGW, NF, SVGW.

- Drain device for bleeding the downstream installation.- Pressure reducing valve with yoke and diaphragm with 2 pressure taps either side of the device.

Ideal to save time and space = 5 functions, 1 only assembly!Two 1/4" (8x13) side ports for pressure gauge.Rough brass finished.

HYDRObLOC

Max. inlet pressure: 16 bar.Adjustable: 1,5 to 5,5 bar.

diameter art. no.HYDROBLOC - Female 3/4” free nut / female 3/4” 2284050

Pressure reducing valve with by-pass U5b

Pressure reducing valve with yoke and diaphragm, with built-in filter and by-pass.• Inlet swivel union nuts.• Built in filter easily removable, upstream of the device. • Large spring and diaphragm for a precise adjustment.• Maintainability without special tools.• Horizontal or vertical assembly, fluid going up.

Diaphragm: Nordel with nylon. Valve: Buna. Body bronze, seat and spring stainless steel.

diameter A (mm) B (mm) C (mm) weight (kg) art. no. U5B Standard art. no. U5B pressure gaugeF/F 1/2” (15x21) 108 47 146 1,8 2228100 2228107F/F 3/4” (20x27) 114 50 162 2,3 2228101 2228108F/F 1” (26x34) 152 50 175 2,7 2228102 2228109F/F 1”1/4 (33x42) 180 60 200 4,2 2228103 2228110F/F 1”1/2 (40x49) 200 80 240 6,5 2228104 2228111F/F 2” (50x60) 240 85 279 10,4 2228105 2228112special pressure gauge for U5B - reversed reading 0/10 bar 2266106

Max. inlet pressure: until 20 bar.Adjustable: 1,5 to 5,5 bar.Delivered preset at 3 bar.


U5B with 1/4” female pressuregauge port underneath valve(supplied with plug)

U5B standard: withoutpressure gauge port

Connection for pressuregauge on request

Composition:

description Meter connection by 3/4” free nutSpherical 1/4 turn valve Check valve test orificeAntipollution check valveDrain system (hexagon brass cap)Pressure adjusting screw (1,5 to 5,5 bar approx.)Pressure reducing valveConnection for pressure gaugeF3/4” connection

Dimensions:


17

Spring kits (2 to 8 bar)

Model with balanced valve and piston, guidance sleeve valvemachined and polished. EPDM reinforced seals.Body ductile cast iron covered epoxy varnish.Standard assembly in horizontal position (setting screw tothe top).Ring cast iron. For cold water maxi. 40°C.Plugs F 1/4” for pressure gauge on two sides of the body, Standard: PN16 setting from 1,5 to 6 bar.PN25 setting from 4 to 12 bar.

Flanged pressure reducing valve DRVD PN16

Flanged pressure reducing valve DRVD PN25

diameter setting range type art. no. packagingDN 50 4 to 12 bar DRVD PN25 22L0504050 1DN 65 4 to 12 bar DRVD PN25 22L0504065 1DN 80 4 to 12 bar DRVD PN25 22L0504080 1DN 100 4 to 12 bar DRVD PN25 22L0504100 1DN 125 4 to 12 bar DRVD PN25 22L0504125 1DN 150 4 to 12 bar DRVD PN25 22L0504150 1

Max. inlet pressure: 16 bar.Max. temperature: 40°C.Kits of seals or springs availa-bles.

On request: setting kit 2 to 8bar or 4 to 12 bar (specify theDRVD diameter).

Consult us for the time.

Pressure reducing valve DRVD - DN 50 and 65 Pressure reducing valve DRVD - DN 80 and 100 Pressure reducing valve DRVD - DN 125, 150 and 200

art. no. type22L0599070 DF 8/DRVD 5022L0599071 DF 8/DRVD 6522L0599072 DF 8/DRVD 8022L0599073 DF 8/DRVD 10022L0599075 DF 8/DRVD 150

Spring kits (4 to 12 bar)art. no. type22L0599080 DF 12/DRVD 5022L0599081 DF 12/DRVD 6522L0599082 DF 12/DRVD 8022L0599083 DF 12/DRVD 10022L0599084 DF 12/DRVD 12522L0599085 DF 12/DRVD 15022L0599086 DF 12/DRVD 200

Seals kits (PN 16 & PN 25)diameter type art. no.DN 50 JT/DRVD 22L0599200DN 65 JT/DRVD 22L0599201DN 80 JT/DRVD 22L0599202DN 100 JT/DRVD 22L0599203DN 125 JT/DRVD 22L0599204DN 150 JT/DRVD 22L0599205DN 200 JT/DRVD 22L0599206Seals bag for DRVD.

models DN L (mm) H (mm) h (mm) F (mm)

DRV-D50 50 230 300 83 165DRV-D65 65 290 350 90 185DRV-D80 80 310 390 100 200DRV-D100 100 350 440 121 220DRV-D125 125 400 560 152 250DRV-D150 150 450 670 169 285DRV-D200 200 550 1050 234 340

Identical model to the standard DRVD above but PN25 and setting from 4 to 12 bar.

diameter setting range type art. no. packagingDN 50 1,5 to 6 bar DRVD PN16 22L0504053 1DN 65 1,5 to 6 bar DRVD PN16 22L0504068 1DN 80 1,5 to 6 bar DRVD PN16 22L0504083 1DN 100 1,5 to 6 bar DRVD PN16 22L0504103 1DN 125 1,5 to 6 bar DRVD PN16 22L0504128 1DN 150 1,5 to 6 bar DRVD PN16 22L0504153 1DN 200 (on request) 1,5 to 6 bar DRVD PN16 22L0504203 1

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diameter range type art. no..DN 50 1 to 7 bar PR500 PN16 22500050548DN 65 1 to 7 bar PR500 PN16 22500065548DN 80 1 to 7 bar PR500 PN16 22500080548DN 100 1 to 7 bar PR500 PN16 22500100548DN 125 1 to 7 bar PR500 PN16 22500125548DN 150 1 to 7 bar PR500 PN16 22500150548DN 200 1 to 7 bar PR500 PN16 22505200548DN 250 1 to 7 bar PR500 PN16 22505250548

models DN PN A (mm) B1 (mm) B2 (mm) C1 (mm) C2 (mm) weight (kg) pressure gauge plug

PR500-50 50 16 230 170 85 165 95 25 F 3/8”PR500-65 65 16 290 170 85 165 95 25 F 3/8”PR500-80 80 16 310 175 85 165 100 30 F 3/8”PR500-100 100 16 350 190 120 210 110 40 F 1/2”PR500-125 125 16 400 200 150 285 125 70 F 1/2”PR500-150 150 16 480 210 150 285 145 90 F 1/2”PR500-200 200 16 600 235 200 360 170 150 F 1/2”PR500-250 250 16 730 280 255 475 200 400 F 1/2”

For all the drinkable water supply networks: building, distribution of water, industry, pumping.

Stabilizes automatically the pressure downstream with theregulated value.

Very simple pressure adjustment by system screw and nut.

Body cast iron covered epoxy integral interior, outsideSeat: stainless.Standard assembly in horizontal position. (Vertical assembly fluid going up: DN 50 to DN 150 only).

Simple construction. Minimum maintenance.

Pressure reducing valveWATTS PR500

Max. pressure: 25 bar Max. temperature: 20°CAdjustable: 1 to 7 bar,(see cavitation curves).

1 - Body / Main valve2 - Fixed orifice3 - Flow strainer4 - Pilot valve5 - Air vent6 - Flexible tubing

Face

Topdownstream pressuregauge plug 3/8”

upstream pressuregauge plug 3/8”


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Hydraulic characteristics:Cavitation: If the differential of pressure between theupstream and the desired downstream is too large, thenit will be necessary to reduce the pressure in severalstages by the installation of a series of pressure reducingvalves.A high inlet pressure and a low downstream pressurecan cause a deterioration of the valve by cavitation. To avoid this phenomenon, please refer to the curveshereafter.

designation DN marks (draw) part no.SET 1 - disc and diaphragm assembly (internal NBR parts), including: axis, diaphragm, diaphragm disc, axis nut, brace washer, disc guide, seals and seat disc, disk supportInternal set 2” (EU100 DN050/065/080) 50 / 65 / 80 4, 5, 8, 9, 10, 11, 12, 14, 15 22500050920Internal set 3” (EU100 DN100)" 100 4, 5, 8, 9, 10, 11, 12, 14, 15 22500080920Internal set 4” (EU100 DN125/150) 125 / 150 4, 5, 8, 9, 10, 11, 12, 14, 15 22500100920Internal set 6” (EU100 DN200) 200 4, 5, 8, 9, 10, 11, 12, 14, 15 22500150920Internal set 8” (EU100 DN250) 250 4, 5, 8, 9, 10, 11, 12, 14, 15 22500200920SET 2 - valve base set (internal NBR parts), including: diaphragm, brace washer, seals and seat discInternal set 2” (EU100 DN050/065/080) 50 / 65 / 80 5, 10, 11, 14 22500050900Internal set 3” (EU100 DN100) 100 5, 10, 11, 14 22500080900Internal set 4” (EU100 DN125/150) 125 / 150 5, 10, 11, 14 22500100900Internal set 6” (EU100 DN200) 200 5, 10, 11, 14 22500150900Internal set 8” (EU100 DN250) 250 5, 10, 11, 14 22500200900SET 3 - seat set (stainless steel), including: stainless steel seatSeat set 2” (EU100 DN050/065/080) 50 / 65 / 80 13 22500050910Seat set 3” (EU100 DN100) 100 13 22500080910Seat set 4” (EU100 DN125/150) 125 / 150 13 on requestSeat set 6” (EU100 DN200) 200 13 on requestSeat set 8” (EU100 DN250) 250 13 on requestPilot 263AP brass body/aluminium cover 50 to 250 500/4 2244001Other replacement partsFixing ring 10 mm plastic 50 to 250 500/2 22500000047Calibration strainer 10 mm stainless steel 50 / 65 / 80 500/3 22544010122Calibration strainer 15 mm stainless steel 100 / 125 / 150 / 200 / 250 500/3 22544015122Air vent 3/8” nickel plated brass 50 / 65 / 80 500/5 22900257110Air vent 1/2” nickel plated brass 100 / 125 / 150 / 200 / 250 500/5 on requestFlexible tubing 10 mm plastic PA 50 to 250 500/6 22503000900Flexible tubing set with fittings 50 500/6 (with fittings) 22503050946Flexible tubing set with fittings 65 500/6 (with fittings) 22503065946Flexible tubing set with fittings 80 500/6 (with fittings) 22503080946Flexible tubing set with fittings 100 500/6 (with fittings) 22503100946Flexible tubing set with fittings 125 500/6 (with fittings) 22503125946Flexible tubing set with fittings 150 500/6 (with fittings) 22503150946 Flexible tubing set with fittings 200 500/6 (with fittings) 22503200946Flexible tubing set with fittings 250 500/6 (with fittings) 22503250946

Repair kits:

Example: 15 bar upstream, 1 bar downstream = cavitation, unauthorized10 bar upstream, 4 bar downstream = no cavitation, authorized

Cavitation(unautorized)

Possibility of cavitation(not recommended)

No cavitation(recommended)

WATTS INDUSTRIES France

1590 avenue d'Orange CS 10101 SORGUES 84275 VEDENE cedex - FRANCE

Phone +33 (0)4 90 33 28 28 - Fax +33 (0)4 90 33 28 29/39

www.wattsindustries.com - E-mail : [email protected]

Product range Watts Industries

- System disconnectors- Backflow protection devices- Check valves- Safety units- Safety relief valves- Pressure reducing valves- Automatic control valves- Butterfly valves- Shut off valves- Measuring gauges

- Temperature control- Expansion vessels- Process switches- Fuel products- Gas products- Electronic controls- Installation protection products- Radiator valves- System products- Manifolds and fittings

Re-order no. 55-UK-14/09

presscre redccing daldes - watts industries · pressure reducing valves 7 as the water temperature...

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