26 Nov 2012 - Using a car seal to lock a ball valveHere's some useful tips on using cable locks and car seals to lock a valve.

Using a cable lock, chain or car seal to lock a valve lever can be difficult. The problems are as follows:

1. If the chain or cable is too near the end of the lever it can be slid off, thereby overriding the valve locking

function.

2. If the chain or cable is too near the valve stem, it may be possible to turn the lever regardless of the cable

or chain seal device. (The chain or cable could stretch or snap while doing this).

If preventing valve operation is absolutely critical, and overriding could lead to a serious, hazardous

situation, you should consider using a mechanical valve interlock. If however, it's just to prevent accidental

operation, the car seal cable or chain device should be adequate and there are a few steps you can take to

prevent overriding.

Firstly, double wind the car seal or chain device around the lever, midway along it's length.

You could drill a hole in the valve lever to pass the cable through. To this this, you might need a hot work

permit. Be sure to clear up an swarf afterwards and deburr the hole.

If you are locking the valve in the open position, it's a good idea for the cable or chain to pass around the

valve body/pipeline. In this way it's virtually impossible to turn the valve lever.

If the valve is being locked closed, pass the cable or chain around some nearby pipe or steel work as an

anchor point. But be sure that the cable doesn't then become a trip hazards

Mechanical Valve Interlocks Guarantee Safety in Locking Out Critical Valves

June 2011

Customized systems available for all type of valves

Houston, Texas (June 7, 2011) – Many industrial processes require valves to be secured in a locked-open or locked-

closed position. Netherlocks’ mechanical valve interlocks eliminate human error to ensure that critical valves are

locked in the proper position.

Standard interlocking products use a padlock and key, and provide no information about the current position of the

valve. Netherlocks’ mechanical valve interlocks are operated with two color-coded keys, which through a trapped

key mechanism, control the open and closed position of a valve and communicate its current state. When the

green key is released, the valve is locked in the “locked-open” position. For the red key to be released, the valve

must be locked in the “locked-closed” position. If a valve is left in a midway position between open and closed,

both keys are trapped in the device. Through this system, the current position of the valve is guaranteed.

Netherlocks’ valve interlocks are fully mechanical with no need for electronic wiring. They are easily incorporated

into new construction and are ideal for retrofitting older installations to mitigate potential safety issues.

Netherlocks manufactures a wide range of interlocking devices to fit all types and sizes of valves. All interlocks

feature a simple and robust design. For dependable longtime operation all valve interlock components are made

from corrosion resistant 316 Stainless Steel.

Netherlocks NL-H Universal Locking Device for Handwheel and Lever Operated ValvesMarch 2011

Corrosion-resistant lock ideal for work in corrosive environments

Houston, Texas (March 18, 2011) – Providing secure lockout for all types and sizes of manual valves, Netherlocks

offers the NL-H Hybrid Lock. The NL-H can secure valves in every position, and its universal compatibility

eliminates the need for maintaining an inventory of assorted lockout products for each type of valve on-site.

The universal NL-H uses a flexible steel cable to immobilize a valve’s handwheel or lever. The unit secures to the

valve with a padlock, to ensure the valve cannot be operated. The NL-H is made entirely from corrosion-resistant

316 stainless steel for reliable operation in harsh environments such as in offshore or chemical applications.

Netherlocks’ NL-H saves maintenance personnel’s time, by eliminating the need for scouting trips into the field to

determine the correct lockout product for a valve. By bringing an NL-H to the job site, workers can be assured any

valve will be safely locked out so that work can be completed.

Netherlocks TVL Protects Control Valves’ Calibrated PositionSeptember 2011

Houston, Texas (September 23, 2011) – Netherlocks’ TVL (Throttle Valve Lock) allows users to secure a throttle,

choke or control valve in any position. The TVL is an ideal process control tool for ensuring that specific calibration

settings are not changed without the proper clearance.

The TVL is integrated onto the valve and controlled by a single key which, when removed from the lockbox,

renders the valve inoperable. Products like wires and chains to secure a valve allow small movements even while

the lock is applied. When the TVL is used, it leaves no room for “play” and protects the valve’s calibrated position.

The TVL is constructed from corrosion resistant 316 stainless steel and designed to withstand extreme operating

environments. It features maintenance-free operation and an integrated safety system to prevent unlocking

without the designated key.

Netherlocks Safety Systems B.V. News - www.netherlocks.com

Compliance with New BSEE Regulations for Offshore Drilling from NetherlocksFebruary 2013

ISI Touch Screen displays required safety and environmental information

Houston, Texas (February 13, 2013) –The Interlock System Information (ISI) Touch Screen from Netherlocks

enables offshore oil and gas facilities to comply with new mandatory guidelines from the American Bureau of

Safety and Environmental Enforcement (BSEE).

The ISI Touch Screen stores all relevant information about interlocks, flow charts, instrument diagrams and other

plant specific information in a central place, as required by the mandatory BSEE regulations. It is used in

conjunction with Netherlocks key interlocking systems, integrating into the key cabinet or mounting separately.

Combined with the Netherlocks key interlocking system, ISI eliminates human error and clearly displays

information about each specific key and its corresponding interlock. Information is easily accessible to every

operator in every location.

The regulations are part of the Workplace Safety Rule on Safety and Environmental Management Systems (SEMS),

which covers all offshore oil and gas operations in federal waters. SEMS also mandates the previously voluntary

requirement that facilities develop and maintain a Safety and Environmental Management System as outlined in

the American Petroleum Institute Recommended Practice 75 (RP 75). This includes making safety and

environmental information available at every facility, including design data, flow charts of facility processes, and

diagrams of mechanical components and instruments.

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Portable Valve Actuator from Netherlocks for Multiple ValvesDecember 2012

Power Wrench is ergonomically designed for safe operation and employee comfort

Houston, Texas (December 10, 2012) – The Netherlocks Power Wrench portable valve actuator facilitates operation

of manual valves for process industry employees while contributing to safe working conditions. It is capable of

opening and closing any size, type or number of manually operated valves, making it a cost effective alternative to

multiple actuators.

The Power Wrench connects to valves by a bolt-on universal drive plate, allowing a single Power Wrench to operate

multiple valves. It is pneumatically powered (4-7 bar) and safe for use in applications where explosive and/ or

flammable liquids or gasses are present.

An integrated safety lever and throttle valve enforce two-handed operation of the Power Wrench, eliminating the

possibility of injury during usage even at maximum power. Variable speed control allows operation at the user’s

comfort level. The device is lightweight at 22 pounds and easily operated from a comfortable standing position,

reducing operator fatigue.

To view an instructional video on the Netherlocks’ Power Wrench visit: http://www.youtube.com/watch?

v=pYLPu5yeR-I&feature=plcp.

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Netherlocks Develops Remote Operation for FAITH PST SystemSeptember 2012

Designed in response to customer demand, Dutch valve safety product manufacturer Netherlocks has developed

the facility for entirely remote operation of its FAITH Partial Stroke Test (PST) system for ESD and HIPPS* valves.

This means that the mechanically-safe, fully-online testing of these critical valves can now be initiated and

performed from the safety and convenience of the control room, without having to manually access the valve.

Netherlocks’ commitment to innovative design and customer satisfaction has enabled the company to now make

this product remotely operable without affecting usability or functionality. Traditionally, an operator would have to

access the valve itself to manually insert a key to start a test. The new development means that the whole process

can now be done remotely from the control room, making it significantly easier and faster.

The FAITH system at all times facilitates the partial stroke testing of valves, without any risk of overshoot or

process interruption. The test is never aborted without getting results, and the unique design means that tests can

be performed at real speed – just as it would be for real operation in an emergency. The mechanical limitation on

the degree of valve closure guarantees there is no danger of actual shutdown or upsetting the plant due to

overshooting of the test angle.

The FAITH’s simple mechanical design is key to the reliability of the system. It is a universal add-on product which

is fitted directly between the valve and the actuator and replaces the original couplings. During partial stroke

testing, FAITH’s mechanical steel blocking pins ensure that the valve can only turn to the preset test angle (i.e. 20

degrees). This also allows for maintenance during production.

All FAITH systems can be customized to fit directly between the valve and actuator without additional brackets.

Models are available for both linear and rotating actuators, and electronic switches can also be added to the FAITH

system to allow the control room to monitor the test.

*Emergency Shut Down and High Integrity Pressure Protection System

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Netherlocks Designs Custom Pigging Interlocking System for Nordstream ProjectJune 2012

Custom made control cabinet integrates mechanical and electronic safety measures into one single safety system

As part of the Nordstream pipeline project, Netherlocks has been chosen to provide an electro-mechanical control

cabinet in combination with an interlocking system for the pigging process. A custom, explosion-proof and climate

controlled control cabinet was designed and manufactured in close co-operation with Siemens AG.

Pigging is a notoriously complex and dangerous process, but one which can be made significantly safer by using

mechanical interlocks. A standard interlocking system guides the operator through the sequence safely. Typically

though, it does not include monitoring, it is not linked to the various pressure levels, and would not include the

facility for remote operation of MOVs (Motor Operated Valves).

The control cabinet that Netherlocks has designed for this project integrates all these aspects into one unit: remote

MOV operation controls are included, and correct pressure and position of MOVs are conditional requirements to

release the keys for each stage of the process. By locking the keys in place in the MPCU (Mechanical Process

Control Unit) that forms part of the cabinet, only the correct process steps can be made and only when it is safe to

do so.

For this particular project the control cabinet also displays the launcher and receiver layout, indicating vessel and

pipeline pressure and MOV position at each stage of the sequence. This custom designed solution from Netherlocks

therefore combines the key cabinet, display, MOV control system and MPCU into one unit, meaning that the

pigging operation is as centrally located as possible, but still mechanically safeguarded by the interlocking system.

Following the Netherlocks philosophy, this project demonstrates that the intelligent use of electro-mechanical

safety systems and key interlocking processes allows the potential risk of human error to be eliminated.

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Netherlocks VPI Ensures Reliable Monitoring of Handwheel-Operated ValvesJune 2012

Device mounts on new and existing valves with no modifications required

Houston, Texas (June 20, 2012) – Netherlocks Safety Systems’ Valve Position Indicator (VPI) provides process

facility control rooms with a reliable remote signal, allowing personnel to maintain awareness of handwheel-

operated gate valves’ current position.

In the process industry, awareness of valves’ current status is essential to avoiding injury and equipment damage.

The VPI uses a mechanical counter to convert a valve’s open and closed positions to electronic signals. This

ensures the accuracy of valve status signals sent to the control room.

Each VPI is custom built, allowing customers to choose whichever electronic switch they prefer. The device mounts

immediately beneath a valve’s handwheel without modifications to the valve. The VPI’s design eliminates

externally mounted switches, weak welding, loose wiring and fragile brackets that cause false alarms in traditional

monitoring systems. It can be mounted on both new and existing valves.

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Petronor Orders Over 1000 Wireless VPI Handwheel Valve Position Indicators for Bilbao Petronor Oil RefineryMarch 2012

1160 wireless VPI units have been ordered from Dutch valve safety specialist Netherlocks by Bilbao Petronor Oil

Refinery, part of Spanish oil and gas giant Repsol. Following a very successful three year pilot program, the new

equipment will replace existing valve position signalling at the 220,000 barrels-per-day refinery.

The VPI (Valve Position Indicator) was designed by Netherlocks to provide a reliable feedback signal from hand

wheel operated valves, converting the open and closed positions to a digital signal by way of a mechanical counter

system. Overcoming traditional issues about mounting strength and signal reliability, both the VPI’s mounting

method and counter use well-tested and proven designs, which have been used successfully in Netherlocks’

mechanical interlock systems for over 15 years.

The VPI is an ‘add-on’ product, and can be mounted to either new or existing hand wheel operated gate, globe or

rising stem valves without interrupting normal process. Coupled with the mechanical counter system, Netherlocks

uses an ATEX-approved switch as standard – though customers are able to change this specification if required.

Once mounted in place, the ‘open’ and ‘closed’ set points are adjusted and the result is a completely reliable

system for valve position indication.

For the Bilbao Petronor Oil Refinery, Petronor wanted a wireless solution, which posed no problem using the VPI

technology. Because the counter works simply and mechanically, the valve position tracking will always be reliable

at the point of detection – to make the feedback to the control room wireless, it simply required a wireless

transmitter to be fitted along with the switch, as per the customer’s specification.

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Netherlocks Closure Door Locks for Pigging SystemsFebruary 2012

Key operated interlocks remove human error from valve operation sequences

Houston, Texas (February 23, 2012) – Improper operation of pigging system valves can result in equipment

damage, injury or death. Netherlocks Safety Systems Closure Locks eliminate the danger to personnel and

equipment by ensuring that correct operation procedures are followed every time pigging operations take place.

Pigging systems are used to insert a pipeline inspection gauge (PIG) into a live system transporting gas or liquid

media, in order to perform various maintenance operations. Dealing with such high pressure levels, pigging

operations require that a precise sequence of valve operation is followed in order to avoid disastrous

consequences. Netherlocks’ Closure Locks protect against improper operation of a pigging system’s most

important valve, the closure door.

Common accidents that occur during pigging operations often involve the system’s closure door. These incidents

include opening the closure door while pressure still remains inside the vessel, opening the main process valve

while the closure door is not fully closed, and opening the closure door while a high concentration level of toxins

still remains inside the vessel.

Closure Locks are operated using a series of keys that lock into place, and can’t be removed out of sequence. This

guarantees that workers always follow the correct valve operation procedure.

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New Touchscreen Interlock Management System from NetherlocksJanuary 2012

Dutch interlock specialist Netherlocks has now launched its new Interlock System Information (ISI) Touch Screen

key management device. As a standalone unit or integrated into either a key cabinet or control panel, the ISI Touch

Screen stores all relevant information about an interlock system in a digitised, centralised, user-friendly format

that is easily accessible by any operator without a need for specialised training.

All relevant interlock keys are shown on screen, and simply touching them will display detailed information about

the key itself and the related system: system name, operating sequence logic, P&ID and Location. Additional

buttons are present for on-screen instructions, general interlocking information and Netherlocks contact details;

company-specific content can also be added if desired. If a printer is connected, operating sequence instructions

can even be printed out for future reference away from the console.

By making clear information about the lock system and safety procedures easily available to everyone in the

workplace, the ISI Touchscreen helps to keep all workers well-informed to reduce confusion, enhance productivity

and improve plant safety.

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Netherlocks Manifold Interlocks Prevent Human ErrorNovember 2011

Products suitable for all manifold manufacturers

Houston, Texas (November 15, 2011) – Netherlocks’ manifold interlocks ensure that instrumentation valve

operation on hydraulic manifolds conforms to process protocol. The interlocks are ideal for use on manifolds with

1oo2 (1-out-of-2), 2oo3 and 3oo4 configurations.

Netherlocks’ manifold interlocks are constructed from corrosion resistant 316 stainless steel. They use small

operating keys to control the locked open (LO) and locked closed (LC) positions of the instrumentation valve. When

installed, an operator can no longer deviate from the process procedure. Netherlocks’ manifold interlocks can be

customized to fit any type of manifold manufacturer, including Parker, Swagelok and Aptek.

PSV safety relief systems

Danger

Both onshore and offshore process installations are often provided with pressure relief systems.Having a spare relief capacity enables continuous production while conducting maintenance on your system on a live plant without a shut down of the process.These twin or multiple pressure relief systems are often fitted with isolation block valves upstream and downstream of each safety relief valve.At all times it should be prevented that all relief valves are blocked at the same time.Always open one of the spare lines first before isolating the operational relief valve to avoid overpressure explosions of the pressure vessels.

Solution

To ensure that at least one relief valve will be open at all times a valve interlock can be installed on each upstream and downstream block valve. Taking the start key from the control room commences the change over of the PSV system following the sequence step by step. The system also ensures that the higher pressure rated upstream block valves are closed prior to the lower pressure rated downstream block valves.The quantity of the (safety relief) valves may vary and is always depending on the client requirements.

Operation

The upstream and downstream block valves of PSV A and the downstream block valve of PSV B are locked open. (V1, V2 andV4)The upstream block valve of PSV B is locked closed. (V3)Note: The downstream block valve of PSV B is normally kept open because of the higher pressure rating of the upstream block valve of PSV B.

Taking the start key B from the control room commences the change over of the PSV. Insert key B in valve V3 to unlock the closed position of the valve. Open valve V3 and take out key C. Valve V3 is now locked open.All four block valves are locked open consequently both PSV A and B are open.To isolate PSV A unlock the open position of valve V2 by inserting key C. Close valve V2 and take out key D. Valve V2 is now locked closed. Insert key D in valve V1 to unlock the open position of the valve. Close valve V1 and take out key E. Valve V1 is now locked closed. PSV A is now isolated. With key E back in the control room a work permit can be obtained to service PSV A for testing or maintenance.To go back to the original position of the valves the same sequence has to be mirrored. Depending on which key is stored in the key cabinet you have an overview of each status of the valves.

PIG traps

Danger

Pigging systems are often found in the oil and gas industry. They are designed so that the pig is loaded into the launcher, which is pressurized up to launch the pig into the pipeline through a kicker line. The pig is removed from the pipeline via the receiver at the end of each run.If not operated correctly following a predetermined sequence, opening the vessel to the atmosphere can be very dangerous and care must be taken to ensure that the vessel is depressurized prior to opening. If the vessel is not completely depressurized, the pig can be ejected from the vessel and operators have been severely injured when standing in front of an open pig door.

Solution

To ensure that a predetermined sequence is followed while loading and unloading pig traps a mechanical key interlocking system is crucial.Interlocks can be installed on the Closure doors, Main valves (either MOV or manual), Vent valves, Drain valves, Pressure valves and Kicker valves.The system also ensures that the outlet valves are fully open when a pig passes through.Taking the start key from the control room commences the procedure to launch the pig following the sequence step by step. The design can either be a linear concept or as described in this example a nonlinear sequence through a sequence control box (SCB). The predetermined sequence may vary and is always depending on the client requirements.

Products

Lever of handwheel valves:

Closure door lock (SDL CD)MOV lockSequence control box(SCB)Key cabinet

- option 1 integral lock- option 2 bolt lock

Operation

In this example we will follow all required steps to launch a pig safely. Every step in the sequence is predetermined in the sequence control box following the required procedure step by step. To begin ensure that all valves are locked closed.

Depressurize procedure:

1 Open and close the vent valve. Take key A from the sequence control box (SCB). Insert key A in valve V1 (vent) to unlock the closed position of the valve. Open valve V1 and take out key B. Valve V1 is now locked open with key A trapped. Key B travels back to the SCB. Turn the knob of the SCB one step further. Now take key B again from the SCB and follow the mirrored sequence to close the vent valve again. After completion turn the knob of the SCB one step further.

2 Open and close the drain valve. Take key C from the sequence control box (SCB). Insert key C in valve D1 (drain) to unlock the closed position of the

valve. Open valve D1 and take out key D. Valve D1 is now locked open with key C trapped. Key D travels back to the SCB. Turn the knob of the SCB one step further. Now take key D again from the SCB and follow the mirrored sequence to close the drain valve again. After completion turn the knob of the SCB one step further.

Ensure zero pressure of the vessel or else repeat steps 1 and 2 using the return button on the SCB (Optional).

Line up procedure:

3 Open and close the closure door. Take key E from the sequence control box (SCB). Insert key E in the closure door to unlock the closed position. Open the door and insert the pig. Key E is trapped as long as the door is open. Close the door and lock the door by taking out key E. Key E travels back to the SCB. Turn the knob of the SCB one step further.

4 Open and close the vent valve to release any entrapped air. For procedure see step 1.

5 Open and close the pressure valve. Take key F from the sequence control box (SCB). Insert key F in valve P1 (pressure) to unlock the closed position of the valve. Open valve P1 and take out key G. Valve P1 is now locked open with key F trapped. Key G travels back to the SCB. Turn the knob of the SCB one step further. Now take key G again from the SCB and follow the mirrored sequence to close the pressure valve again. After completion turn the knob of the SCB one step further.

6 Open the kicker valve. Take key H from the sequence control box (SCB). Insert key H in valve K1 (kicker) to unlock the closed position of the valve. Open valve K1 and take out key I. Valve K1 is now locked open with key H trapped. Key I travels back to the SCB. Turn the knob of the SCB one step further.

7 Open the main valve. Take key J from the sequence control box (SCB). Insert key J in valve M1 (main) to unlock the closed position of the valve. Open valve M1 and take out key K. Valve M1 is now locked open with key J trapped. Key K travels back to the SCB. Turn the knob of the SCB one step further.

Pig launching:

Slowly close the bypass valve to move the pig until after the barred tee at the downstream than fully open the bypass again. (Normally this is not part of the interlocking sequence)

8 Close the main valve. Take key K again from the SCB and follow the mirrored sequence of step 7 to close the main valve again. After completion turn the knob of the SCB one step further.

9 Close the kicker valve. Take key I again from the SCB and follow the mirrored sequence of step 6 to close the kicker valve again. After completion turn the knob of the SCB one step further.

10 Depressurize the pig trap again by repeating step 1 and step 2.

Storage tanks

Danger

When discharging storage tanks on (petro-) chemical plants there is often a hazard of mixing two or more chemicals by forgetting to close a discharge valve before opening another. This can lead to product degradation or more serious, this can lead to dangerous chemical reactions.During normal operation only one tank should be opened at the same time.

Solution

To prevent opening more than one valve at the same time a valve interlock can be installed on each individual valve leaving them all locked closed to be operated with the same key. This key can be stored in a key cabinet in the control room.

Products

Lever of handwheel valves:

Key cabinet

- option 1 integral lock- option 2 bolt lock

Operation

All 3 valves V1, V2 and V3 are locked closed with key A in the control room.Take key A from the control room and select one of the tanks to be opened.If selected for example tank 2, insert key A in the valve V2. Unlock the closed position of the valve and open the valve. Take out key C and return to the key cabinet with this key. Valve V2 is now locked open and valve V1 and V3 remain locked closed. Once the valve V2 is open the key A will be trapped consequently key A cannot be used to open tank 1 or 3. To select another tank take key C from the key cabinet unlock and close valve V2.Take out key A from valve V2. Now all valve locks are locked closed again and you can make a new selection.Depending on which key is stored in the key cabinet you have an overview of each status of the valves. For example if key C is in the key cabinet valve V2 is locked open and all other valves are locked closed.

Lever Valve / Option 2: Bolt Lock

Dimensions

Depending on valve size.

Description

As an alternative for integral valve locks it is also very well possible to use bolt locks for valve interlocking. A mounting system is designed for each valve depending on the type and size of the valve. Besides the economical benefits and the fact that the original lever of the valve is maintained, it has another great advantage. You can install all brackets on the valves before plant start up and you are still able to freely operate any valve as you like. For example closing all valves at the same time for testing of the plant. After you have set up your final valve positions simply mount the bolt locks on each applicable position using a special tool and two M8x30 coded bolts.Alcatraz bolt locks fits on all type of handwheel and lever operated valves such as gate valves, globe valves, ball valves plug valves, butterfly valves and all gear operated valves. A bolt lock is mounted on the mounting system for each locked open and/or locked closed position of the valve. Their applications includes changeover of pressure relief valves, loading and unloading of pig traps, sampling devices etc.

Types of Mounting System Available for Valve Interlocks Using Bolt Locks for Lever Operated Valves

M03/BLOLC

M03/BLO

M03/BLC

Alcatraz mounting system for any lever operated valve, locked open and closed.Alcatraz mounting system for any lever operated valve, locked open.Alcatraz mounting system for any lever operated valve, locked closed.

Features

No black box: the operator can constantly see what he is doing.

Solid and compact construction with a minimum of moving parts.

Material: Stainless steel 316, electro polished.

The key will survive a drop of more than 25 meters.

Very easy and smooth operation, also with gloves.

Exchangeable lock portions and locks.

Resistant against fire and low temperatures.

Resistant against sand, dirt, and moisture.

Very easy to install even when the valve is in operation.

Maintenance free, no grease necessary.

Tamperproof.

No removal of the original lever or other parts of the valve.

No need for welding or modification of the valve.

Minimum of valve data required.

Automatic closing SS316 protection caps on keyholes with text plate as standard.

As an option the integration of electronic components such as limit and proximity switches are available.

Further details can be found at THE ALCATRAZ ADVANTAGE.

Handwheel Valve / Option 2: Bolt Lock

Dimensions

Depending on valve size.

Description

As an alternative for integral valve locks it is also very well possible to use bolt locks for valve interlocking. A mounting system is designed for each valve depending on the type and size of the valve. Besides the economical benefits and the fact that the original handwheel is maintained, it has another great advantage. You can install all brackets on the valves before plant start up and you are still able to freely operate any valve as you like. For example closing all valves at the same time for testing of the plant. After you have set up your final valve positions simply mount the bolt locks on each applicable position using a special tool and two M8x30 coded bolts.Alcatraz bolt locks fits on all type of handwheel and lever operated valves such as gate valves, globe valves, ball valves plug valves, butterfly valves and all gear operated valves. A bolt lock is mounted on the mounting system for each locked open and/or locked closed position of the valve. Their applications includes changeover of pressure relief valves, loading and unloading of pig traps, sampling devices etc.

Types of Mounting System Available for Valve Interlocks Using Bolt Locks

M01/G50

M01/G60

M01/G80

M02/GE

M04/GB

Alcatraz mounting system for gate valve size 1”- 3”.Alcatraz mounting system for gate valve size 4”- 6”.Alcatraz mounting system for gate valve size 8”- and up.Alcatraz mounting system for any gear operated valve. Alcatraz mounting system for any globe valve.

Features

No black box: the operator can constantly see what he is doing.

Solid and compact construction with a minimum of moving parts.

Material: Stainless steel 316, electro polished.

The key will survive a drop of more than 25 meters.

Very easy and smooth operation, also with gloves.

Exchangeable lock portions and locks.

Resistant against fire and low temperatures.

Resistant against sand, dirt, and moisture.

Very easy to install even when the valve is in operation.

Maintenance free, no grease necessary.

Tamperproof.

No removal of original handwheel or other parts of the valve.

No need for welding or modification of the valve.

Minimum of valve data required.

Automatic closing SS316 protection caps on keyholes with text plate as standard.

As an option the integration of electronic components such as limit and proximity switches are available.

Further details can be found at THE ALCATRAZ ADVANTAGE.

Pig Closure Doors

DimensionsSDL CD Depending on brand, size and type of the closure door.

DescriptionAlcatraz closure door locks are mostly used in combination with interlocking of the venting and draining valves. The locks

can be installed on all type of closure doors to interlock pig receiving or launching systems. If not operated correctly

following a predetermined sequence these systems can be very dangerous.

Since there are many different closure doors the final design may vary, the principle of the closure doorlock however is

always the same. As long as the door is open the key will be trapped. Only when the door is fully closed and the bleed

bolt is back in position the door can be locked by taking out the key.

Types of Closure Doorlocks AvailableSDL CL

Alcatraz single key door lock closure door

Features

Solid and compact construction with a minimum of moving parts.

Material: Stainless steel 316.

The key will survive a drop of more than 25 meters.

Very easy and smooth operation, also with gloves.

Exchangeable.

Resistant against fire and low temperatures.

Resistant against sand, dirt, and moisture.

Very easy to install.

No welding required.

Maintenance free, no grease necessary.

Tamperproof.

Automatic closing SS316 protection caps on keyholes with text plate as standard.

Further details can be found at THE ALCATRAZ ADVANTAGE.