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