API 6D Natural Gas Plug Valve Introduction
API 6D Natural gas plug valve is with a plug valve lubricated structure, which is also called as Pressure balance lubricated plug valve with API 6D standard. API 6D Natural gas plug valve was widely applied for petroleum, chemical industry, pharmacy, chemical fertilizer, power industry etc, and the main application of API 6D Natural gas plug valve is cutting and connecting the pipeline medium with pressure class 150 to class 2500 under the temperature -29 ℃ to +180 ℃ or -40 ℃~450 ℃.
API 6D Natural Gas Plug Valve Main Characteristics
1. There are compact structure, reliable sealing, perfect function and attractive shape for lubricated plug valve natural gas.
2. It can be called as Pressure balance lubricated plug valve and is a plug valve with Inverted pressure balance structure, easy to be opened or closed.
3. There is a oil groove between API 6D Natural gas plug valve body and sealing surface, the sealing grease can be injected into the seat through glib ( oil nozzle) to increase the sealing performance.
4. For the spare parts material and flange size, this can be customized according to different actual working condition to meet project requirements.
API 6D Natural Gas Plug Valve Technical Specification
Design & manufacture |
API 599, API 6D |
Nominal diameter |
1/2 Inch -16 Inch ( DN15-DN400) |
Pressure class |
Class 150 - 900 LB |
Length of face to face |
ASME B16.10 |
Flange end |
ASME B16.5 |
Test & inspection |
API 598, API 6D |
Operation model |
Handle wheel, worm gear, pneumatic and electric actuated |
API 6D Natural Gas Plug Valve Main Parts Material
NO |
Part Name |
Material |
1 |
Body |
ASTM A216 WCB, ASTM A217 WC1, WC6, WC9, C5, ASTM A351 CF8, CF8M, CF3, CF3M |
2 |
Plug |
ASTM A182 Gr. F6a, ASTM A182 F22, ASTM A217 WC1, WC6, WC9, C5, ASTM A351 CF8, CF8M, CF3, CF3M |
3 |
Gasket |
Flexible graphite+stainless steel |
4 |
Cover |
ASTM A216 WCB, ASTM A217 WC1, WC6, WC9, C5, ASTM A351 CF8, CF8M, CF3, CF3M |
5 |
Bolt |
ASTM A193 B7, A193 B8, A193 B8M |
6 |
Nut |
ASTM A194 2H, A194 Gr. 8, A194 Gr. 8M |
7 |
Packing |
Flexible graphite + SS 304 |
8 |
Gland |
ASTM A216 WCB, ASTM A217 WC1, WC6, WC9, C5, ASTM A351 CF8, CF8M, CF3, CF3M |
9 |
Wrench |
ASTM A216 WCB, ASTM A351 CF8, CF8M, CF3, CF3M |
10 |
Yoke nut |
ZQA 19-4 |
11 |
Handwheel |
ASTM A536 Gr. 60-40-18, ASTM A216 WCB |