GF-PRV-01

Pressure Reducing Valve

Piston-operated pressure reducing valve for water, heating and compressed air branches. Holds the set outlet while the inlet swings. Nickel-plated brass, 25 bar inlet, DN15 to DN50.

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Overview

Product Overview

The equipment on a branch was ordered for one inlet pressure, and the main rarely holds that number all day. The GF-PRV-01 keeps the outlet at the set value with a compensated piston against an adjusting spring, so a rise at the inlet closes the seat instead of reaching the fittings downstream. Nickel-plated CW617N body, internals in HPb57-3, inlet to 25 bar, outlet 0.5 to 8 bar, −20 to +120 °C, DN15 to DN50.

Parameter	Value
Size	DN15-50
Connection	Female / female, G BSPP, BSPT or NPT
Max. inlet pressure	25 bar
Outlet set range	0.5 to 8 bar
Working temperature	−20 to +120 °C
Body and internals	Brass CW617N / HPb59-1, internals HPb57-3

Where it goes

Branch lines in building water supply, heating and compressed air systems, and any other non-corrosive liquid service that needs one steady reduced pressure. One valve per branch, flow arrow downstream, ahead of the equipment it protects.

Common questions

How do I choose between DN15 and DN50?

Match the branch pipe size. Female G threads run from ½ inch on DN15 to 2 inch on DN50, and face to face is 70 mm to 120 mm, so the valve takes the same run of pipe. Weight runs 581 g to 2123 g across the range.

Can it be used on compressed air?

Yes. The valve is listed for water, compressed air and other non-corrosive liquids, from −20 to +120 °C. Seals and gaskets are EPDM across the whole range.

What sets the outlet pressure?

An adjusting spring under the top cap, held by a lock nut. Outlet runs 0.5 to 8 bar against an inlet of up to 25 bar. Every internal part is numbered in the parts table, so spares are ordered by position.

Dimensions and Weights

DN	Connection (A)	L (mm)	H (mm)	Weight (g)
15	G ½''	70	123	581
20	G ¾''	80	123	632
25	G 1''	85	137.5	893
32	G 1¼''	105	155.5	1503
40	G 1½''	115	155.5	1578
50	G 2''	120	175	2123

GF-PRV-01 pressure reducing valve cross-sectional dimension drawing, with L A H installation size markings — GF-PRV-01 piston pressure reducing valve sectional view with key installation dimensions

Materials of Construction

GF-PRV-01 piston type pressure reducing valve exploded view drawing, numbered parts breakdown for assembly and maintenance — GF-PRV-01 pressure reducing valve exploded diagram with numbered component references

No.	Component	Material	Standard
14	O-ring	EPDM 7001
13	Plug	PVC
12	Top cap	HPb57-3	GB/T 5231
11	Lock nut	PVC
10	Bonnet	HPb57-3	GB/T 5231
9	Spring	UNS S30400 / EN 1.4301
8	O-ring	EPDM 7001
7	O-ring	EPDM 7001
6	Stem	HPb57-3	GB/T 5231
5	Body	HPb57-3	GB/T 5231
4	Gasket	EPDM
3	Seat	HPb57-3	GB/T 5231
2	Gasket	Gasket paper
1	Bottom cap	HPb57-3	GB/T 5231

Standard body material: brass HPb57-3 (GB/T 5231; Cu 56–58%, Pb 2.5–3.5%).

Surface finish: valve body nickel-plated.

Other grades: HPb59-1 (GB/T 5231), CW617N (CuZn40Pb2; EN 12164 / EN 12165) and CW602N dezincification-resistant brass. All three are available on request and must be stated on the order. We do not substitute a different grade without your written approval.

Minimum order quantity: applies to all four grades.

Lead content: all four are leaded brass. HPb57-3 carries 2.5–3.5% lead, CW617N and CW602N 1.6–2.5%, and HPb59-1 0.8–1.9%. For potable water, confirm the lead-leaching limits of the destination market before ordering.

Material certificate: EN 10204 3.1 on request. The grade stated on the certificate governs.

Specifications

Parameter	Value
Product Type	Pressure Reducing Valve
Series	GF-PRV-01
Body Material	CW617N / HPb59-1
Internals	CW617N / HPb57-3
Nominal Size	DN 15–50
Pressure Rating	PN 25
Maximum inlet pressure	25 bar
Outlet pressure adjustable	0.5–8 bar
Working temperature	−20 … +120 °C
Connections (female/female)	G (ISO 228-1) · BSPT (ISO 7-1) · NPT

Models

Product Model Selection

Material	DN	Connections	Weight (g)	Code Number	Inquiry
Brass	15	Internal thread ISO 228-1(BSPP) G ½''	581	GF-PRV-01-15	Request Quote WhatsApp
Brass	20	Internal thread ISO 228-1(BSPP) G ¾''	632	GF-PRV-01-20	Request Quote WhatsApp
Brass	25	Internal thread ISO 228-1(BSPP) G 1''	893	GF-PRV-01-25	Request Quote WhatsApp
Brass	32	Internal thread ISO 228-1(BSPP) G 1¼''	1503	GF-PRV-01-32	Request Quote WhatsApp
Brass	40	External thread ISO 228-1(BSPP) G 1½''	1578	GF-PRV-01-40	Request Quote WhatsApp
Brass	50	External thread ISO 228-1(BSPP) G 2''	2123	GF-PRV-01-50	Request Quote WhatsApp