China factory High Quality Industrial steam gate valve supplier Manufacturer
What is steam gate valve ?
Steam gate valve is a special design of gate valve.
It’s an alternative to the traditional flexible wedge type gate valves. The disc is in two halves, compressed spring Inconel X750 loaded, that seat on parallel seat rings. The disc “slides” in contact with the seats, hence the name.
The discs are in permanent contact with the seat rings, getting a tight seal due to the horizontal inconel spring located in between and without the wedging system help.
Sealing mechanism of the parallel slide gate valves.
- When the pipe pressure or pressure difference of two sides is small,the compressed spring will push the discs to the sealing rings,it’s the initial sealing of the parallel slide gate valves under low pressure conditions.
- When the pipeline pressure increase,the increasing line pressure will push the disc against the seat ring with force in the low pressure side,which creates the secondary seal. The higher the medium pressure,the better the sealing performance
Main features of NORTECH steam gate valve
Design Features
- Tight shut off achieved by line pressure— not from mechanical wedging action therefore eliminating thermal binding
- Minimum pressure drop
- Bi-directional shut off to API 598
- Self cleaning action between disc and seat
- Bypass arrangement available
- Available in high temperature carbon steel, chrome-moly steel, and stainless steel materials of contruction: ASTM A216 GR WCB, ASTM A217 GR WC6, ASTM A217 GR, WC9, and ASTM A351 GR CF8M.
- Available with manual operator, or fitted with suitable actuator of choice
| Product name | Parallel slide gate valve |
| Nominal diameter | 2”-24”(DN50-DN600) |
| End connection | RF,BW,RTJ |
| Pressure rating | PN16/25/40/63/100/250/320,Class 150/300/600/900/1500/2500 |
| Design standard | ASMEB16.34,API 6D |
| Working temperature | -29~425°C (depending on materials chosed) |
| Inspection standard | API598/EN12266/ISO5208 |
| Main application | Steam/Oil/Gas |
| Type of operation | Handwheel/Manual gearbox/Electric actuator |
Disc and Spring of the steam gate valve:compressed spring in inconel X750 is placed between two discs in parallel position.
Pillar and Bridge BBOSY of the steam gate valve:Pillar & bride BBOSY design,the York is designed with 2 or 4 forged steel pillars,depending on the valve diameter.
Hydraulic test of NORTECH steam gate valve
Inspection of steam gate valve.
- shell test 1.5 times of rated pressure
- low pressure seal test with air 0.6 Mpa
- low pressure seal test with water 0.4 Mpa
Product Show:steam gate valve
Where is the steam gate valve used?
Steam gate valve is widely used in the field chemical,petroleum, natural gas,oil and natural gas production wellhead device, conveying and storage pipelines (Class150~2500/PN1.0~42.0MPa, operating temperature -29~450℃),pipes with suspended particle media,urban gas pipeline,water engineering.it's designed to provide isolation and transmission of flow in a piping system or a component when closed, sometimes can be installed in the pump outlet for regulating or control of flow.
