8/2/2019 50 NB Piston Valces TIS

1/2

PistonValves

Description :

Size andPipe Connections :

Limiting Conditions :

Installation :

Cast steel piston valves provide perfect tightness anddurable stability on different mediums such as steam,superheated steam, heat transfer fluid, ammonia, L.P.G.,

acids, alkalies ,etc.

50 NB Flanged Ends.

FlangeType :ANSI 300

IBR APPROVED VALVES AVAILABLE.

MaximumoperatingPressure : 51barg

Maximumoperatingtemperature : 427 C

MaximumHydraulictestPressure : 102barg

The Valve is designed for installation in a vertical line orhorizontal line with inlet as per the arrow direction. Toopen the valve turn hand wheel till it stops at the topand to close turn hand wheel till it touches the bonnet. Donot use 'F' Key. If any leakage is observed during operationfrom the bonnet hole or at the outlet, close valve fully and

tighten Opposite Nuts (7) equally half or one turn untilleakage stops.

ANSI300

0

OperatingRange:

Howtoorder:

Available Spares :

How to order Spares:

Example : ForbesMarshall 50 NB PistonValve with ANSI 300 Flanged connection IBRor NIBR .

Sealing Rings

Order Spares as per the code no. specified in the UserManual .

Please specify medium.

ISO 9001 : 2000

Certificate:0410019940422

Safety Information :Pressure

Maintenance :

Before attempting any maintenance of the Valve, ensure

that pressure is isolated and safely vented to atmosphere.Do not assume that the system is depressurized even whena pressuregauge indicateszero

Maintenance of Piston valve is very easy and can be donewhile the valve is in position & not in service. Remove nuts(7) and bonnet (2) remove the top sealing rings, spacer andbottom sealing rings. Replace with a new set of rings andspacer in the same order. Ensure that Belleville washersare placed properly and all Nuts are tightened with equalpressure. Open isolation valve if any leakage is observedtighten opposite nut equally in fully close position of valvetill leakage stops. Take care to tighten diagonally oppositenuts.

Theproduct must notbeused inthis region.

C-FFlanged ANSI300

Steamsaturationcurve

F

Pressurebarg

Temperature

C0

427

300

200

100

00 10 20 30 40 51

C

PistonValves

8/2/2019 50 NB Piston Valces TIS

2/2

Subjecttochangewithoutnotice. FTIS-33000/DEC/2005/6090

ManufacturedMarketedby:

A ForbesMarshallCompany

P.B.No.29,Mumbai-PuneRoad,Kasarwadi,Pune-411034.India.Tel.:91(0)02027145595Fax:91(0)02027147413,27147593URL :http://www.forbesmarshall.com/spirax

Ahmedabad, Alibag,Bangalore,Bharuch,Chandigarh,Chennai,Coimbatore,Delhi,Hyderabad,Jamshedpur,Kolkata,Mumbai,Nagpur,NaviMumbai,Pune,Surat,Vadodara,Visakhapatnam.

Bhopal,Indore,Madurai,Pondicherry.

ForbesMarshallPvt.Limited

Branches :

Representatives :

SIZE L D PCD T

50NB 267 165 127 19 22

Dimensions:(approximate)inmillimeters

T E F

225 285

H

8

No.ofHoles

Material :

ThrustPlate

NamePlate

SplitNut

Handwheel

Spacer

SealingRing

13

14

12

11

10

9 S/SreinforcedGraphite

S.G.Iron/MalleableIron

StainlessSteel

StainlessSteel

StainlessSteel

StainlessSteel ASTM A 743Gr.CA15

ASTM A 276 TP 410

ASTM A 276 TP 410

B.Washer

Stud

NylocNut

Spindle

Piston

Bonnet

Body

Partart

8

7 Nut

6

5

3

4

1

2

Noo

SpringSteel

CarbonSteel

CarbonSteel

CarbonSteel

StainlessSteel

StainlessSteel

CastSteel

CastSteel

ASTM A 193GRB7

50CrV4

ASTM A 194GR2H

ASTM A 216Gr.WCB

ASTM A 216Gr.WCB

ASTM A 276 TP 410

ASTM A 276 TP 304

Materialaterial

DonotuseValveKey

Alwaysopen&closeValvefully

Approx.Weight

17.5Kg