Gate Valves

①DEMCO GATE VALVE

 Technical Features： 

DM GATE VALVE (Interchangeable with Demco Model DM Gate Valve) The DM Gate Valve, are solid gate, rising stem, gate valves with resilient seals. They are purpose made for mud, cement, fracturing and water service and are easy to operate and simple to maintain. Features: - Designed specifically for Abrasive and Erosive use  - All Valves Have Stainless Steel Stems - API 6A PSL 1, 2 and 3 available  - Gates can be supplied in Nickel-Plated Carbon Steel, Monel, Aluminum Bronze or Stainless Steel  - Stainless or Carbon Steel Inserts with Nitrile or HNBR Elastomer  - Factory Pressure Tested in Accordance with API 6A  - Can be supplied with Flanged End Connections, Hammer Union Ends, Threaded Connections or Butt Weld Ends  - Available with Pressure Ratings up to 5,000 psi in 2", 3", 4", 5" x 4" and 6" x 4" Valve Sizes

②RISING STEM SLAB GATE VALVE

-  Non-rising stem，compact structure , space saving，available with  flange and thread connection -  Full bore design eliminates efficiently pressure drop and vortex, and eliminates washing by solids in fluid

-  Metal-to-metal seal is used between bonnet and body, gate and seat, body and seat      

-  The surface of gate and seat is weld overlay with hard alloy, which has feature of  corrosion resistance and washing resistance

-  The bonnet and stem designed with back seal, can replace stem seal ring under pressure

-  One side of bonnet is designed with sealant injection in order to supply sealant  and improve seal and lubrication performance of gate and seat

-  Working Pressure：2000Psi~20000Psi

-  Nominal Bore：1-13/16”~9”（46mm~230mm）

-  Working medium：oil, natural gas, and mud -  Working temperature：-46℃~121℃（Class L~U）

-  Material Class：AA、BB、CC、DD、EE、FF、HH

-  Specification level：PSL1~PSL4

-  Performance Requirements：PR1~PR2

-  Comforms to API 6A

③NON-RISING STEM SLAB GATE VALVE

 Technical Features：

 - Full bore design eliminates efficiently pressure drop and vortex, eliminates washing by solids in fluid. - Mental-to-mental seal is used between bonnet and body, gate and seat, seat and body.

- The surface of gate and seat is welding overlay with hard alloy, which has feature of corrosion resistance and washing resistance.

- The balanced stem can balance the stem load, reduce load of stem thread and bearing to decrease operating torque.

- The bonnet and stem are designed with back seal, which can replace stem sealing under pressure. - One side of bonnet is designed with sealant injection valve. - Rising stem structure can indicate open and close of valve.

- Complete with different pneumatic (hydraulic) actuator upon user’s requirements.

- Working Pressure: 2000PSI～20000PSI - Nominal Bore: 1.13/16"～9" (46mm～230mm) - Working Medium: oil、natural gas、mud and gas containing H2S、CO2 - Working Temperature: -46°C～121°C（Class LU）

- Material Class: AA、BB、CC、DD、EE、FF、HH - Specification level: PSL1-4 - Performance Requirement: PR1-2 -  Comforms to API 6A

 ④NON-RISING STEM SLAB GATE VALVE

 Technical Features：

 The opening and closing mechanism of hydraulic plate valve takes hydraulic control manner, so that it is very convenient for using to automatic control system and remote control.

 Technical parameters:   

- Pressure rating: 2000～15000psi - Nominal size: 1 13/16" ～ 4 1/16"

- Operating temperature: P U

- Property rank: PR1-2 - Specification level: PSL 1-3

- Materiel class: API 6A AA – FF

- Operating pressure : 107～1500psi