Wafer Check Valve

Design Features:

Wafer Type or Lug Type
Metal to Metal Seats, Soft Seats
Long-life Spring
End type: Wafer, Lug-Wafer, Double Flange, Butt-weld, Hub

Specification:

Basic Design: API-594
Face to Face : API-594
Size: 2"- 30"
Working Pressure: 125LB-2500LB
Material: Cast Steel, Alloy Steel, Duplex SS
Test & Inspection: API-598
End Connection: ANSI B16.5, ANSI B16.47, ANSI B16.25

Features
1. Small in size, light in weight, compact in structure, easy in maintenance.
2. Two torsion springs are used excreting on each of the pair valve plates. Which close the plates quickly and automatically.
3. The quick-close action prevents the medium from flowing back and eliminates water-hammer effect.
4. This valve is short in length, so that it is rigid and easy to mount.
5. It is easy to install on pipeline which is laid horizontally or vertically.
6. This valve is tightly sealed without leakage under the pressure water test.
7. Safe and reliable in operation, high interference-resistance.
8. The connection dimensions of flanges accord with the standards of GB4216-84 GB4216.84
9. The face to face dimensions are in accordance with GB12221-89.ISO5752-82. The stem of the valve should be perpendicular to the horizontal level when the valve is mounted on horizontal pipeline. For vertical installation the direction of flow should be downward.

Product Details
Design and Manufacture	ANSI B16.34,API6D
Face to face(end to end)	API6D
Flanged connection	2"~24"to ANSIB16.5,22",26"~36"to MSS-SP-44 to API605 on Request
Test and inspection	API6D Shell test 150Lb 450 PSI 300Lb 1125 PSI Seat test 150Lb 315 PSI 300Lb 815 PSI(Hydrostatic)80PSI(Air)

Materials for main parts

Part	WCB	A352 LCB	A217 WC6	A217 WC9	A217 C5	A217 C12	A351 CF8	A351 CF8M
Body	A216 WCB	A352 LCB	A217 WC6	A217 WC9	A217 C5	A217 C12	A351 CF8	A351 CF8M
Disc	A351 CF8	A351 CF8	A182 F11	A182 F22	A217 C5	A217 C12	A182 F304	A182 F316
Stem	A182 F304	A182 F304	A182 F304	A182 F304	A182 F304	A182 F304	A182 F304	A182 F316
Spring	Stainless steel
Rubber Gasket	EPDM-46~+121 Neoprene-50~+150 NBR-35~+113 Fluororabber-23~+150

 

Size		D	D1	D2	L	R	t	Weight(Kg)
mm	inch
50	2~	107	65	43.3	43	28.8	19	1.5
65	2.5~	127	80	60.2	46	36.1	20	2.4
80	3~	142	94	66.4	64	43.4	28	3.6
100	4~	162	117	90.8	64	52.8	27	5.7
125	5~	192	145	116.9	70	65.7	30	7.3
150	6~	213	170	144.6	76	78.6	31	9.0
200	8~	273	224	198.2	89	104.4	33	17
250	10~	323	265	233.7	114	127	50	26
300	12~	378	310	283.9	114	148.3	43	42
350	14~	438	360	332.9	127	172.4	46	55
400	16~	439	410	381.0	140	197.4	52	75
450	18~	555	450	419.9	152	217.8	58	101~ 107
500	20~	594	505	467.8	152	241	58	111
600	24~	690	624	572.6	178	295.4	73	172
700	28~	800	720	680	29	354	98	219