Specification :

Bolt bonnet OS & Y lifting-round plug.
Its sealing is realized by the sealing rings around the valve disc. It has unique protection of swallow tailed sink and fixed sealing rings. Double direction.

Principle of opening and closing of the valve

when the valve is fully opened, the channel of plug is in alignment with the channel of valve body, which can ensure ideal and lowest decrease on pressure. When the hand wheel is turned, the plug will rotate toward the closing direction, and make the same time draft the rotation of valve seat and close the valve. When the hand wheel is turned inversely, first of all the plug will move upward, and the valve disc and valve seat will be separated; if the hand wheel is turned further on; till the valve disc is turned by 90 degree driven by the plug, and finally the channel of plug will be in alignment with the channel of valve body, so that the valve is be fully opened.

Standards compliance

Design and Manufacture: API 599, API 6D
Face to face( end to end) : ANSI B 16.10
Flanged connection: ANSI B 16.5
Butt welded end: ANSI B16.25
Test and inspection: API 598, API 6D

Main pants materials
NO. Part name Material
A216 WCB A351 CF8 A351 CF8M A351 CF3 A351 CF3M
1~ 14 Botten/ yoke A216 WCB A351 CF8 A351 CF8M A351 CF3 A351 CF3M
2 " O" ring NBR/ FEP/ SBR/ PTFE
3 Sealing ring NBR/ FEP/ SBR/ PTFE
4 Plug A182 F6a A351 CF8 A351 CF8M A351 CF3 A351 CF3M
5~ 8 Body cover A216 WCB A351 CF8 A351 CF8M A351 CF3 A351 CF3M
6~ 7 Bolt/ nut B7/ 2H B8/ 8 B8M/ 8M B8M/ 8M B8M/ 8M
9 Packing Flexible graphite+ stainless steel/ PTFE
10 Gland A216 WCB A351 CF8 A351 CF8 A351 CF3 A351 CF3M
11 Hand wheel ASTM A536 Gr.60-40-18 A216 WCB
12 Yoke nut Cu-Allog/ A439-D2
13 Yoke nut bushing A216 WCB A351 CF8
17 Pin A182 F6a A182 F321 A182 F321 A182 F316 A182 F316L
15~ 18 Stem/ Disc A182 F6a A182 F304 A182 F316 A182 F304L A182 F316L
16 Guiding stud A182 F6a A182 F304 A182 F316 A182 F304L A182 F316L