Valve Interlock for Lever Operated Valves
QL valve interlocks suit all types of lever operated quarter turn valves, including ball, butterfly, and plug valves.
Available in single key (QLl) or double key (QL2) versions, locking the valve in either the open or closed position, or if the QL2 version is specified, the valve can be locked in both the open and closed position
Valve Interlock for Hand Wheel Operated Valves
GLM & GLS valve interlockGL valve interlocks suit all types of handwheel operated valves, including gate, globe, and gear-operated valves. Available in single key (GL1) or double key (GL2) versions, locking the valve in either the open or closed position, or if the GL2 version is specified, the valve can be locked in both the open and closed position
Key Cabinet for Interlock Systems
Provide an effective and infallible management control system unauthorised or inadvertent operation of interlocked valves under secure supervisory control.
Valve Interlock for Pig Launcher System
Access into pressure vessels is a potentially hazardous exercise. Residual pressure, volumes of residual liquids or gases all can be harmful – typical examples of these potential hazards include pig traps, slug catchers and filter housings. Locking the vessel closure in the closed position ensures access into the vessel can be achieved only under controlled safe conditions. The operating key is held in a secure place – e.g. Control Room or Supervisor’s office or is retained (trapped) in some other related interlocked item of equipment.
As a minimum, vessel closures are usually interlocked with vessel venting and draining functions – the interlocking arrangement can be extended to incorporate all process items of equipment relating to the vessel’s function
Valve Interlock for Actuated Valves
The most common requirement for key interlocking of poweractuated valves occurs in Pig Launcher/ Receiver systems, Scraper Traps and Sand Filter systems etc. where poweractuated valves need to be interlocked with manually-operated valves and the vessel closure.
Because of the ultra-critical nature of such valves, special considerations arise which the design of a key interlock system must address:
Where such valves are part of an ESD system, the key interlock system must not compromise the valve’s fail-safe function. Where such valves are part of an ESD system, the key interlock system must not compromise the valve’s fail-safe function.
Where pigging operations occur, the key interlock system must verify the valve’s absolute position (Open and/or Closed) independent of any on-board instrument indication.
On electrical actuators where the key interlock system de-energises the valve, any anti-condensation heating circuitry etc. must remain uninterrupted.
Valve Interlock for Flexi-Drive Interlock System
Flexi-Drive is a very versatile product consisting of two stations, joined by a unique patented linear drive cable.
This equipment enables valves and other wheel-operated devices in remote, hard-to-reach or hazardous locations to be operated easily from a conveniently located and safe handwheel station.
Valve Interlock for Easi-Drive Interlock System
Easi-Drive is an efficient and cost-effective alternative to a dedicated actuator.
Wherever you have manually-operated valves that have high operating torques, hundreds of handwheel turns to open/close or are just difficult to operate then easi-drive is your solution
Valve Interlock TorkDrive
Smith Flow Control Introduces TorkDrive to Prevent Plant Shut-Down and Protect Plant Assets
Smith Flow Control launches TorkDrive, a device that can be mounted to either the valve input handwheel or directly to the valve input shaft to safeguard the valve from excessive torque.
TorkDrive has two distinct benefits. It prevents valve damage, thus reducing the need for expensive plant shutdown and valve replacement (through over-torque) and provides vital information regarding site maintenance requirements.
TorkDrive can increase valve life as it prevents the operator from applying excessive force when closing the valve, protecting the valve seat. TorkDrive controls the torque applied when operating a valve, ensuring that the same force is used regardless of the strength of the operator.
TorkDrive can be incorporated seamlessly into plant maintenance systems and schedules. TorkDrive is set to a predetermined maximum torque and, if during the operation cycle of the valve, the operating torque increases above the maximum limit, the TorkDrive will slip, indicating an irregular valve condition. This will alert the operator to report the valve status to Site Maintenance, rather than continue to apply force to the valve.
TorkDrive boasts a compact design, weighing less than 4kg, despite an all-mechanical construction. It is a completely maintenance free device, made from 316 Stainless Steel and is suitable for oil refineries, power plants, paper mills, water plants and chemical processing facilities. TorkDrive withstands temperatures from -56°C to +100°C, with a torque setting range from 80Nm – 500Nm. TorkDrive can be installed directly to manually operated valves, requiring torque monitoring over 80Nm (Ball, Gear, Gate & Globe etc). TorkDrive also benefits from IP65 protection, safeguarding the device in the most aggressive of environments.
TorkDrive features unique clutch plates that are controlled by a series of calibrated compression springs. Two spring set configurations are available, a low range TorkDrive unit offering a maximum torque output range between 80Nm – 280Nm and a high range unit offering 250Nm-500Nm. Each unit is factory set before installation and the unit can be adjusted to suit the host equipment’s torque requirements using a calibrated setting scale within the body of the device. Each spring set has a unique colour code, thus ensuring that the correct torque range is always used.
TorkDrive comes complete with a tool for making fine adjustments.
The TorkDrive is supplied with bespoke adaptation to the host valve and its own operating handwheel/lever.
Sofis KMS Key Management System
- Master Cabinet can Supports a maximum of 80 Key positions, Sub cabinets a maximum of 120 key positions and satellite cabinet a maximum of 8 keys.
- Can manage up to 200 Systems / Sequences
- Custom Configurable software loaded to an IPC
- Multiple Level User access
- Key Logging and Reporting
- NL & SFC key portions available
- Optional RFID Badge reader and UPS available.
- Easily retrieve lost keys
- Easy handover between shifts
- Automate key usage authorization
- Easily find the right key for operation
- Easily find related sequence schematics and P&ID’s
- Obtain valve / system status information based on key detection
- An option to allow all keys to be released via a single switch in an emergency
- To protect against power failure an uninterruptible power supply option is available
- Option for fiber optic connection between Master ,Sub and Satellite Cabinets
- Lockable door
- Efficiency & Performance
- Improve overall integrity at your plant
- Save time searching for the right keys for your critical systems
- Less intensive process than handing out keys via permits
- Provides a quick overview of your critical systems
- Easily obtain valve / system status information based on key detection
- Safe Operation and Continuous Output
- Delays in shift handovers due to missing keys
- Ensure that the right key is permitted to the right person
- Remote access for operating keys
- Prevent unauthorized critical valve operations
- Help guide your operators through day-to-day interlock operations to maintain zero incidents