OEM Manufacturer Bellows Seal Gate Valve - Flat Gate Valve Parallel Slide valve – BVMC

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OEM Manufacturer Bellows Seal Gate Valve - Flat Gate Valve Parallel Slide valve – BVMC Detail:

Introduction

Through conduit valves are widely used for oil and gas pipeline service. This type of valve has such function that, when fully opened, media passage capability superior to valves in use for general secondary process line, it can also be capable for pig ball Cleaning service. BVMC through conduit gate valves are available in Slab Gate and Expanding Gate design and both are fully comply with API 6D standard.

Slab Gate Valve

Slab gate valve is simple in design but efficient in performance. This design utilizes two spring loaded floating seats which are pressure energized, moving the upstream seat in contact with the gate that brings about a tight and complete seal with both the upstream and downstream.

Technical Specification

Structural reference		GB	API
Design standard		JB/T5298 GB/T19672	API6D ASME B16.34
Structural length	Flanged	GB/T 12221 GB/T19672. JB/T5298	API6D ASME B16.10
	Welded connection	GB/T12221 GB/T19672
Flanged ends		GB/T9113 JB/T79	ASME B16.5 MSS SP44
Butt-welding ends		GB/T 12224	ASMEB16.25
Test & inspection		GB/T13927 JB/T9092	API6D API598

Note: The sizes of valve connecting flange can be designed according to customer’s requirement.

Major Parts Material Form

No.	Part name	Material
		Ordinary type			Anti-sulphur type
		GB	ASTM		GB			ASTM
1	Blow down stops	25+Zn	A105+Zn		12Cr18Ni9			A276-304
2	Grease injection joint	25+Zn	A105+Zn		25+Zn			A105+Zn
3	Body	WCB	A216-WCB		WCB			A216-WCB
4	Disc	16Mn+ENP	A105+ENP		12Cr18Ni9			A276-304
5	Seat	16Mn+PTFE	A105+PTFE		12Cr18Ni9+PTFE			A276-304+PTFE
6	O-ring	NBR	NBR		FPM			FPM
7	Stem	2Cr13	A276-420		12Cr18Ni9			A276-304
8	Packing seat	2Cr13	A276-420		2Cr13			A276-420
9	“Y” ring	NBR	NBR		FPM			FPM
10	Sealing shroud	20Cr13	A276-420		2Cr13			A276-420
11	Indicating stem	12Cr18Ni9		A276-304		12Cr18Ni9	A276-304
12	Gasket	Graphite+1Cr18N9		Graphite+304		Graphite+1Cr18N9	Graphite+304
13	Bonnet	WCB		A216-WCB		WCB	A216-WCB
14	Stud	35CrMoA		A193-B7		35CrMoA	A193-B7
15	Nut	45		A194-2H		45	A194-2H
16	Yoke	WCB		A216-WCB		WCB	A216-WCB

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