How does a parallel slide gate valve work?
Our Parallel Slide Gate Valve uses position seating allowing the line force in the system to assist in the sealing of the valve seat by holding the downstream disc firmly against the downstream seat. This requires the valve seat in a double disc wedge gate to actually deform to provide seating.
Which valve used in steam line?
Ball valves
Ball valves are commonly used in steam, water, oil, gas, air, corrosive fluids. They can handle slurries and dusty dry fluids. Ball valves are not used with abrasive and fibrous materials as it poses risk of damage to the seat and plug surface.
What is a parallel slide?
Parallel slide construction can be furnished for high differential pressure services or where thermal expansion may cause sticking of a wedge type. The parallel slide gate assembly consists of two interchangeable spring loaded discs, a fully guided disc holder, and retaining pins.
Can you use a gate valve on steam?
The most common type of flexible wedge gate valve used in steam applications is the parallel slide valve. The two plates that constitute the gate are held against the seat by a spring, encased between them.
What is a double disc gate valve?
Double Disc Type Gate Valves have parallel seats against which the wedge is driven when the gate is closes. This results in a tight seal between the disc and the seat. Variation of this design includes valves that depend on fluid pressure to force the disc against the seat.
What are parallel slide gate valves used for?
What’s Parallel Slide Gate Valves? The Parallel Slide Gate Valves are mainly used in the field chemical, petroleum, natural gas designed to provide isolation and transmission of flow in a piping system or a component when closed, sometimes can be installed in the pump outlet for regulating or control of flow.
What are the Velan parallel slide gate valves made of?
Velan pressure seal parallel slide gate valves are ideal for clean service and steam. Velan’s proven pressure seal design. Unique parallel slide forged cage unit design comprises all operating parts of the slide discs. Designed to ASME B16.34. Body made of superior strength forgings and optional cast steel.
Why is the gate valve used in the steam line?
As name suggest Steam traps are basically used in steam line to remove unwanted condensate, which otherwise would lead to hammering inside high temperature/pressure pipeline. They are installed at lowest point in the pipeline or before/after expansion loop or where the pipe changes elevation.
How does the PTFE seal a slide gate valve?
When the pressure inside the valve (cavity, inlet and outlet) is equal or no pressure, the disc is closed and the PTFE sealing ring on the seat surface forms the initial seal. The seat ring can automatically clean the sealing surface on both sides of the disc every time the valve is opened or closed.
What are the benefits of a parallel slide gate valve?
Parallel Slide Gate Valve (PSG) The ValvTechnologies’ Parallel Slide Gate Valve (PSG) addresses advanced design features and benefits and the need for true in-line valve reparability in large diameter, high-energy piping systems resulting from those enhancements.
Which is Velan pressure seal parallel slide gate valves?
Velan pressure seal parallel slide gate valves are ideal for clean service and steam. Velan’s proven pressure seal design. Unique parallel slide forged cage unit design comprises all operating parts of the slide discs. Designed to ASME B16.34.
As name suggest Steam traps are basically used in steam line to remove unwanted condensate, which otherwise would lead to hammering inside high temperature/pressure pipeline. They are installed at lowest point in the pipeline or before/after expansion loop or where the pipe changes elevation.
What kind of slide gate valves are used in gas pipelines?
Pipelines with suspended particle media use Knife type Slide Gate valve. A single gate or double gate soft seal os & y Slide Gate valve is most suitable for use in the urban gas transmission pipeline. Another use of a single gate or double gate open stem Slide Gate Valves without diversion holes is found in urban water supply projects.
