Slab Gate Valve

Fangwen Slab Valve Slab Gate Valves are manufactured with a full bore, slab gate, rising stem OS&Y and floating seats. Slab gate is a simple solid gate design, featuring metal-to-metal seal between gate and seats, to apply for the most severe service condition, including corrosive and abrasive fluid environments. A floating seat is designed to match the slab gate. A belleville spring and O-ring between each seat and body ensure a tight seal against the slab gate. The floating slab gate uses the natural force of line pressure to obtain a dynamically tight downstream seal in high-pressure differential applications. Low-pressure sealing is accomplished with an o-ring that energizes the seat and minimizes corrosion and debris build up. Common trims are available.

Double block and bleed capability and automatic relief of excess body pressure are standard feature of this seat design.

Slab Gate valve design minimizes and eases the maintenance allowing for the service operations to be done without the removal of the valve from the line.

Fangwen offers Cast Gate valves in One piece uni-body, All Cast Gate valves manufactured and supplied by Fangwen are with the following features:

» Manufactured under ISO 9001:2008 Management System, with CE PED & API 6D Certified

» Standards compliance to API 6D, API 6A or equivalents

» Flanged Ends precised to international standards ASME B16.5, BS EN 1092, BS4504

» Rising Stem and Non Rising Handwheel

» Optional Locking Device or Stem Extension

» Solid or Flexible wedge options

» Bolted Bonnet or Pressure Sealed Bonnet

» Soft seated or metal-seated

» Optional Locking Device or Stem Extension

» Optional Direct Mounting to ISO 5211

» Full Port design

» NACE MR-01-75

Fangwen offers Slab Gate Valves including, but not limited to

▲ Resilient Seat Through Conduit Gate Valve ▲ Metal Seat Through Conduit Gate Valve

Resilient Seat Through Conduit Gate Valve

Fangwen Resilient Seat Through Conduit Gate Valve are designed and manufactured API 6D. And these valves seats have a nylon or PTFE circular insert on their sealing faces, when the gate valve is on/off every time, the seat ring can clean the both sides of gate. Enforcing all line pressure onto the through conduit gate valve, the pressure acted onto the gate, forcing it against PTFE Ring of Outlet Seat. Compressing it until the gate is stopped onto the steel seat to form a double sealing: the first sealing is PTFE to Metal, the second sealing is metal to metal, meanwhile, the seat is also firmly forced into its recess. The O-ring prevents any downstream flow at this point. Inlet sealing is formed after the cavity pressure is released; pipeline pressure is acted onto the inlet seat making it move toward to the gate which forms the PTFE to Metal sealing. Meanwhile, O-ring and seat recess forms a compact sealing.

Fangwen Resilient Seat Through Conduit Gate Valve are with main Features as below:

» Size Ranges: 2” through 48”

» Pressure Ratings: ANSI #150 to 2500

» Standards compliance: API 6D, API 6A or equivalents

» Materials: Cast Carbon Steel, Cast Stainless Steel, Cast Duplex or Other Specials

» Ends Connections: Flanged(FF, RF, RTJ) to international standards

» OS&Y, Outside Stem and Yoke

» Soft-sealed(PTFE, NBR, VITON and etc.)

» Optional Locking Device or Stem Extension

» Optional Direct Mounting to ISO 5211

» Full Port