Direct acting pressure reducing valve
Pressure Rating: 1.0- 6.4Mpa
Specification: DN20-400
Material: Steel, CF8
Standard flanges: DIN, ANSI, JIS;

Pressure reducing valves (PRV) are designed to reduce, regulate, protect and automatically maintain a stable and consistent reduced pre-set outlet (downstream) pressure regardless of pressure differentials, inlet pressure changes or down stream flow demand which in turn will reduce and minimise flow noises and water consumption.

This series pressure reducing valve is a new type regulating valve which adopts piston to replace the diaphragm. The performance is reliable and it's can be used for a long time. The down pressure can be adjusted according to the requirement, and it can be set at a fixed pressure in the application, which won't be changed as the fluctuation of the up pressure and the flowing rate.

Direct acting Pressure Reducing Valve main technical parameters and indexes of performance:

Nominal pressure	PN1.6Mpa	PN2.5Mpa	PN4.0Mpa	PN6.4Mpa
Tested pressure of shell	2.4Mpa	3.75Mpa	6.0Mpa	9.6Mpa
Sealing test pressure	1.6Mpa	2.5Mpa	4.0Mpa	6.4Mpa
Maximum upstream pressure	1.6Mpa	2.5Mpa	4.0Mpa	6.4Mpa
Pressure range of outlet	0.2-1.0Mpa	0.2-1.6Mpa	0.2-2.5Mpa	0.5-3.5Mpa
Minimum differential pressure	0.2Mpa	0.2Mpa	0.2Mpa	0.4Mpa
Medium	Steam, water, etc.
Operating temperature	425

*the shell test does not include membrane and top cover.

Direct acting Pressure Reducing Valve material of main component:

Name of component	Material of component
Valve body, valve cover, seat cover	Cast iron, Cast steel
Valve seat,	2Cr13
Valve flap	2Cr13
Valve rod	2Cr13
Cylinder sleeve	2Cr13 /25(hard chrome plating)
Piston	2Cr13
O-shaped ring	Ding nitrile rubber
Sealing encircles	Ding nitrile rubber
Adjusting valve	60Si2Mn

Direct acting Pressure Reducing Valve connecting dimension:

DN	external dimension
	L			H				H1
	PN1.6, 2.5	PN4.0	PN6.4	PN1.6	PN2.5	PN4.0	PN6.4	PN1.6	PN2.5	PN4.0	PN6.4
20	160	160	170	220	220	220	220	90	90	90	90
25	180	200	200	255	255	265	265	95	95	100	105
32	200	220	220	255	255	265	265	100	100	100	110
40	220	240	240	325	325	330	330	115	115	130	130
50	250	270	270	325	325	330	330	120	120	135	135
65	260	280	300	330	330	340	355	125	125	140	145
80	310	330	330	340	340	340	340	135	135	150	160
100	350	380	380	347	347	360	360	148	148	185	185
125	400	450	450	560	560	565	565	190	200	200	245
150	450	500	500	580	580	585	585	205	210	240	280
200	500	560	560	630	630	635	635	220	245