Stainless steel flanged full port diversion hole flat gate valve is mainly composed of four types, 2 inch gate valve, flanged gate valve, full bore gate valve, stainless steel gate valve and water gate valve. It is especially suitable for medium and high pressure liquid and gas pipelines in petroleum, chemical and power stations. During the opening and closing process, the valve body inlet pressure is self-discharging, and the liquid and gas pressures on both sides of the ram are completely self-balancing after the gate valve is closed, so as to reduce the wear of the parts and prolong the service life of the parallel gate valve.
|Pressure rating||Class 150~2500|
|Design standard||API 600|
|Design configurations||Bolted bonnet, OS and Y, rising stem|
|Applicable medium||Oil, gas, water and other corrosive medium|
|Operation||Lever, gear, pneumatic and electric|
1~12 Trim material
Flexible graphite+304/Flexible graphite+316
1. The seat ring uses the floating seat ring structure with o-seal ring sealed and pre-tightening force applied to have inlet and outlet dual-way sealed; and the open-close moment with this structure is 1/2 that of the common valves only, which is able to lightly open and close valves.
2. The seat ring uses the sealing face inlaid with PTFE, so has dual seals of PTFE to metal and metal to metal, the PTFE sealing face also acts as removing the dirt on the wedge disc.
3. For the valve with the metal to metal seal, there is grease injector outside of it,grease gets into the sealing face through the injector and the seat ring to have the valve up to null leak.
4. The wedge disc of the valve with flow guide hole is always fitted with the sealing face whether in full open or full close status to have the sealing face protected without being directly eroded by the medium so as to extend the duration.
5. When fully opened, the valve's channel is smooth and linear, with an extremely small flow resisting coefficient and no pressure loss, and the pipeline can be cleaned with hair-ball through it.
6. An assisting sealing grease injection structure is set in the packing to have the sealing performance absolutely reliable and get a true null leak, settling the problem for the packing place of universal valves to be easiest leak outward.
7. Automatic removal of the high pressure in the internal cavity when the valve is about to close (see the working principle diagram for the details) so as to ensure safety.
8. Fully sealed structure leaves a good protective property, suitable for the requirement of 24-hour duty.
2 inch gate valve, flanged gate valve, full bore gate valve, stainless steel gate valve and water gate valve can be applied to construction, electrical conduit, agricultural irrigation, industrial sewage and other projects using.