Wafer Type Double Petal Check Valve uses butt-installation and is used in the pipeline or on the pump outlet to, as a safety device, prevents the pump from inversed running due to the different water hammer's shock caused by the medium's back-flow in the pipeline when the pump stops. And it features by small volume, light weight, easy installation and maintenance, set with a guide device, flexible and quick close, preventing of huge medium's back-flow differential and forming silencing effect. Suitable for the pipeline of water supply and drainage, warming etc. or the pump outlet to prevent both pump and pipeline from being damaged due to the medium's back-flow and water hammer's shock.

Type	PN(MPa)	Test strength pressure(MPa)	Test Seal performance (MPa)	Working temperature	Applicable medium
H76X-10 H77X-10	1.0	1.5	1.1	≤80℃	Clean-water Slops Sea
H76X-16 H77X-16	1.6	2.4	1.76

Name of parts	Body	Disc	Stem	Spring	seat
Material	C.l 、Bowl-shaped steel、 Stainless steel	C.l 、Bowl-shaped steel、 Stainless steel	Stainless steel	Stainless steel	NBR、Stainless steel

DN mm	L	H	D
			1.0MPa	1.6MPa
50	43	60	105	105
65	46	73	124	124
80	64	89	142	142
100	64	110	162	162
125	70	141	192	192
150	76	168	218	218
200	89	219	272	272
250	114	273	328	328
300	114	324	378	384
350	127	356	438	444
400	140	418	489	495
450	152	457	540	555
500	152	526	594	616
600	178	626	695	734
700	229	672	810	804
800	241	778	916	910
900	241	878	1016	1010
1000	300	914	1124	1128