Parallel Slide Gate Valve

LOV range of high pressure parallel Slide Gate valves is primarily designed for isolation of steam and feed water as well as many other applications.

A parallel slide gate valve seat achieves tightness by utilising the line pressure, rather than by mechanical effort which can be the case with a wedge gate valve design.This eliminates the possibility of binding which may occur with a wedge gate valve as a result of large temperature fluctuations within the valves during service.

The effort required to seal a parallel slide gate valve is therefore much reduce over that required to seal a wedge gate valve. This is an advantage when fitting actuators with the parallel slide design allowing smaller sized actuators to be used, reducing in cost savings.

A parallel slide valve is ideally suited to in-line maintenance with the re-machining of all internal components being on centre and with the seat faces only needing to normally parallel.

Features

Isolation without thermal binding

Bi-directional operation

Position seated - stops on limit not torque

Flat seating surface by Threaded, Welded or integral Seat ring

Minimum pressure drop across the valve

Manual and Actuator operated

Follower eye for very laminar flow is available on request.

It avoids any turbulences and minimizes the pressure drop

Applications

Thermal Power station systems

High Temperature & Pressure Service

Main steam & Feedwater isolation

Feedwater heater protection

Design standard

ASME B16.34 & API-600 / BS-1414

Face to Face: ASME B16.10

Flanged Ends: From 2” to 24” as per ASME B16.5, above 24”

as per ASME B16.47

Butt Weld Ends: ASME B16.25

Pressure classes

ASME 600 – 4500

Sizes

2” - 36” (50mm - 900mm)

(other sizes under request)

Materials

A216-WCB/WCC, A352-LCB, A217-WC6, A217-WC9,

A217-C5, A217-C12, A217-C12A, A351-CF8, A351-CF3,

A351-CF8M, A351-CF3M, A351-CF8C, Alloy 20, Duplex,

Super Duplex, Incoloy, Monel, Inconel, Titanium, Other materials under request.

Accessories

Bypass, Overpressure protection device,

Handwheel with chain, Balance hole, Belows seal

Limit micro switches