Hand Wheel Operated Gate Valves
Gate valves are characterised as having either a rising or a nonrising stem. Rising stems provide a visual indication of valve position because the stem is attached to the gate such that the gate and stem rise and lower together as the valve is operated. Nonrising stem valves may have a pointer threaded onto the upper end of the stem to indicate valve position, since the gate travels up or down the stem on the threads without raising or lowering the stem. Nonrising stems are used underground or where vertical space is limited. Bonnets provide leakproof closure for the valve body. Gate valves may have a screw-in, union, or bolted bonnet. Screw-in bonnet is the simplest, offering a durable, pressure-tight seal. Union bonnet is suitable for applications requiring frequent inspection and cleaning. It also gives the body added strength. Bolted bonnet is used for larger valves and higher pressure applications.
Features
- Wedge: furnished with solid/flexible design at specific request of the user/client.
- Special flange facings can be given to suit specific applications (e.g. Large or small male or female face-ring joint face etc.)
- The valve can be supplied with matching electrically operated actuator for remote/automated control and operation.
- By-pass arrangment/position indicator/extension stem with or without floor stand cane be provided on request.
- Pressure seal design bonnet can be given at specific request of the user/client.
- The design and technical data furnished here are subject to change due to continious product development
