Well-designed China Pn6-Pn10-Pn16-Pn25-Class125-Class150 Lift Check Valves

Short Description:

DRVZ silent check valve is mainly composed of valve body, valve seat, guide body, valve disc, bearing, spring and other main parts. The internal flow passage adopts streamline design, with minimal pressure loss. The opening and closing stroke of the valve disc is very short, which can be quickly closed when the pump is stopped to prevent the huge water hammer sound. It is mainly used in water supply and drainage, fire fighting, heating and ventilation system, and can be installed at the outlet of water pump to prevent backflow and water hammer damage to the pump.

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DRVZ Technical parameters of silent check valve

Product model	DRVZ
Nominal diameter	2”-12”（DN50-DN300）
Nominal pressure	PN10/16/25
Applicable medium	clean water
Applicable temperature	-10℃~80℃

Material of main parts

Part name	texture of material	Part name	texture of material
valve body	GJS 500-7	shim	EPDM
Disc	GJS 500-7+EPDM	Disc nut	ANSI 304
Spring	ANSI 304	Guide sleeve	C61900
O-ring	NBR	Guide body	GJS 500-7
Stem	ANSI 304

Main connection dimensions

Nominal diameter		L	D			D1			N-Φd
DN（mm）	NPS(in)	L	PN10	PN16	PN25	PN10	PN16	PN25	PN10	PN16	PN25
50	2″	150	165	165	165	125	125	125	4-Φ19	4-Φ19	4-Φ19
65	2.5″	170	185	185	185	145	145	145	4-Φ19	4-Φ19	8-Φ19
80	3″	180	200	200	200	160	160	160	8-Φ19	8-Φ19	8-Φ19
100	4″	190	220	220	235	180	180	190	8-Φ19	8-Φ19	8-Φ23
125	5″	200	250	250	270	210	210	220	8-Φ19	8-Φ19	8-Φ28
150	6″	210	285	285	300	240	240	250	8-Φ23	8-Φ23	8-Φ28
200	8″	230	340	340	360	295	295	310	8-Φ23	12-Φ23	12-Φ28
250	10″	250	395	405	425	350	355	370	12-Φ33	12-Φ28	12-Φ31
300	12″	270	445	460	485	400	410	430	12-Φ23	12-Φ28	16-Φ31