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RVH-05i Stainless Steel Inline Pressure Relief Valve

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Piston operated
1/4"-1" NPT THD (larger sizes can be made available)
Orifice sizes 0.047-0.25 inch (1.2-6.4 mm)
Control/Relief pressures up to 4500 PSI (320 Bar) with multiple spring ranges (see table below)
Materials: 303 & 316 Stainless Steel

Printable
Product Specs Instructions

RVH-05i Stainless Steel Inline Pressure Relief Valve

view prices order

Printable
Product Specs Instructions

View Pricing/Ordering Instructions

Piston operated
1/4"-1" NPT THD (larger sizes can be made available)
Orifice sizes 0.047-0.25 inch (1.2-6.4 mm)
Control/Relief pressures up to 4500 PSI (320 Bar) with multiple spring ranges (see table below)
Materials: 303 & 316 Stainless Steel

Applications

Options

Features

Principle of Operation

Dimensions/Material Item List

This pressure control valve is used for very relief valve control applications such as maintaining bypassing excessive pressures from various types of process equipment, and wherever maximum pressures cannot be exceeded in a process or piping system. Because of the needle nose piston, this valve is also used for relieving high pressures at very low flows. The 303 stainless steel valve can be used for non-corrosive or mildly corrosive fluids. Use only clean filtered or strained liquids or gases to remove debris or other solid matter that might cause internal clogging or improper operation of this precision machined valve. Install a filter or strainer with a fine wire mesh (at least #20 mesh) before the inlet of the back pressure valve. High-pressure in-line strainer fittings, basket strainers, and fine wire mesh filtes can be purchased from Stra-Val.

When used with high pressure air or gases, the thermal effects of rapid expansion need to be considered, especially if moisture is present in the gas which could result in the valve freezing up and making it temporarily inoperable while in a frozen state. Several preventative measures may need to be considered, such a moisture removal, limiting pressure reduction in stages, or even heating the valve and related piping.

Standard metal seated valves meet ANSI/FCI Class IV seat leakage standards (0.01% of rated valve capacity, not bubble tight). For low pressure applications, a PTFE seat can be ordered to improve the shutoff class compared to a normal metal seat.

Select from the material options displayed below. Other options available, but not not priced, are:

Panel Mounting,
Hand wheel or hand knob
Locking cap
Hardened Piston and seat

Pressure-containing parts made from solid bar stock materials — unlike castings which have wall thickness variations.
Body: A stainless steel valve is our standard and is available in type 316SS and 303SS. (Special alloys are available to make a Monel valve, Titanium valve, and Hastelloy valve, click here)
Piston Valve/Poppet: Type 316 or 303 stainless steel is standard. For very high pressures, hardened stainless steel is available.
Piston Seal: Standard elastomers are Viton, PTFE, EPDM, Kalrez & other elastomers are also available.
In-line porting is the standard piping arrangement.

This is a direct-acting pressure-relief valve with an adjustable spring operating against a piston subjected to the inlet pressure of the valve. Increasing the spring compression will increase the system or line pressure which will be relieved. Reducing the spring compression will reduce this pressure. An increase in system pressure beyond the set point will cause the piston to open and relieve the excess pressure through the outlet port of the back pressure relief valve. The needle nose piston results in very smooth pressure control not possible with large orifice, flat nose pistons designed for quick pressure release

RVH-05 Typical illustration

RVH-05

Material List and Specification

#	Item	Materials
1.	Adjusting screw	Steel & SS
2.	Lock nut	Steel & SS
3.	Spring chamber	Steel & SS
4.	Spring pusher	Steel & SS
5.	Adjusting spring	Steel & SS
6.	Spring Carrier	Steel & SS
7.	Piston	Stainless steel
8.	Seal	Viton, EPDM, Teflon, Kalrez, etc.
9.	Body	Stainless steel

*Registered DuPont materials

Dimensions ( inches)

A	B	C	D	Max inlet PSI (Bar)
1/8	2	.56	7.25	5000 (340)
1/4	2	.56	7.25	5000 (340)
3/8	2	.63	8.5	5000 (340)
1/2	2	.68	8.5	5000 (340)
3/4	2.5	.88	9	3000 (207)
1	3	1.12	10.62	3000 (207)

Note: Dimensions are approximate and are subject to change without notice. Request certified dimensions before final product installation.

RVH-05i Stainless Steel Inline Pressure Relief Valve

RVH-05i Stainless Steel Inline Pressure Relief Valve

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Applications

Options

Features

Principle of Operation

Dimensions/Material Item List