DRVZ type silent check valveDetailed product description：

Overview
The DRVZ type silent check valve consists of components such as valve body, valve seat, guide body, valve disc, bearing shell, and spring. The internal flow channel adopts a streamlined design, with minimal pressure loss, short valve disc opening and closing stroke, and short pump stop opening and closing stroke. When the pump is stopped, it can be quickly closed to prevent huge water hammer sound and form a silent effect.
This valve is mainly used for water supply, drainage, fire protection, and HVAC systems. It can be installed at the outlet of the water pump to prevent medium backflow and water hammer damage to the pump.

Main technical parameters

Model	DRVZ/T-10	DRVZ/T-16	DRVZ/T-25Q
Nominal Pressure	PN1.0MPa	PN1.5MPa	PN2.5MPa
Nominal Diameter	DN50～DN300(mm)
Maximum work pressure	1.0MPa	1.6MPa	2.5MPa
Sealing test pressure	1.1MPa	1.76MPa	2.75MPa
Shell test pressure service	1.5MPa	2.4MPa	3.75MPa

Main components

Part Name	Material
Valve body, flow guide body	Grey cast iron, ductile iron, cast steel
Valve seat, bearing shell, valve disc, shaft	Bronze or chromium stainless steel
spring	stainless steel

Main connection dimensions of DRVZ type silent check valve

Nominal diameter (mm)	L(mm)
fifty	one hundred and twenty
sixty-five	one hundred and fifty
eighty	one hundred and eighty
one hundred	two hundred and forty
one hundred and twenty-five	three hundred
one hundred and fifty	three hundred and fifty
two hundred	four hundred and fifty
two hundred and fifty	five hundred
three hundred	five hundred and fifty
three hundred and fifty	five hundred and seventy-five
four hundred	six hundred
four hundred and fifty	six hundred and fifty
five hundred	seven hundred

(Flange connection dimensions: PN10 according to GB4216.4-84, PN16 according to GB4216.5-84, PN25 according to 9113.4-88 standard)