• Non-maintance design,inside and outside electrostatic epoxy resin powder coating,the valve can be installed under the ground directly.
• The valve adopts the back seal and the stem seal,those double seals can avoid any top leakage when installation.
• The customer can easily replace the top seal "O" rings under the pressure.
• The valve adopts flat bottom designing ensures no dead space and very little flow resistance.
• The wedge adopts bidirectional groove design ensures the best reliable seal.
• A set of seal pressure angle adopts gradual design.
• The pressured surface of setm adopts high strength self-lubricated materials,the valve can be opened and closed easily.
• The bonnet,body castings adopts equal thickness design to avoid the outside leakage by the stess function.

 

DESIGN STANDARD	FACE TO FACE DIMENSIONS	TESTING STANDARD
DIN3352-4A	DIN3202,F4	DIN3230
DIN3352-4B	DIN3202,F5	DIN3230
BS5163	BS5163	BS5163

 

Nominal diameter DN(mm)	Nominal pressure (MPa)	Water power testing(MPa)		Working temperature≤ 800C Maximum working pressure(MPa)
		Strength testing	Seal testing
40～600	1.0	1.5	1.1	1.0
40～600	1.6	2.4	1.76	2.0
40～300	2.5	3.75	2.75	2.5

 

NO.	PARTS	MATERIAL
1	Body	GGG
2	Wedge	GGG bonded with NBR or EPDM
3	Stem	2Cr13
4	Stem nut	ZCuA110Fe3
5	Middle gasket	NBR or EPDM
6	Bonnet	GGG
7	Bolt	Q235-A
8	Lubricant gasket	PTFE
9	O-ring	NBR or EPDM
10	O-ring	NBR or EPDM
11	Seal bush	POM
12	Seal cover	2Cr13 or 304
13	Dustproof cover	NBR or EPDM
14	Top cover	Pa-66
15	Hand wheel	Sg-12
16	Screw	Cr13