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BPS-09-Npt-EX Back Pressure Reducing Valve

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Spring diaphragm operated
1/4"-2" NPT THD
Control pressures to 80 PSI (5.2 Bar)
Hastelloy, Monel, Titanium, A20

Printable
Product Specs Instructions

BPS-09-Npt-EX Back Pressure Reducing Valve

view prices order

Printable
Product Specs Instructions

View Pricing/Ordering Instructions

Spring diaphragm operated
1/4"-2" NPT THD
Control pressures to 80 PSI (5.2 Bar)
Hastelloy, Monel, Titanium, A20

Applications

Features

Principle of Operation

Dimensions/Material Item List

This valve is used for back pressure control applications such as maintaining constant pump discharge pressures, bypassing excessive pressures from various types of process equipment, and wherever a constant pressure must be maintained in a process or piping system. Valve can be used for non-corrosive or mildly corrosive fluids, depending on the materials selected. When liquids or gases contain debris or other solid matter which might cause internal clogging or improper operation of the valve, a strainer with a fine wire mesh should be installed before the inlet of the valve.Exotic Alloy in-line strainer fittings or Exotic Alloy basket strainers can be purchased from Stra-Val. For gas or air service, a soft-seated version with Teflon or other engineering plastics is available to improve seating performance.

Pressure-containing parts made from solid bar stock materials — unlike castings which have wall thickness variations.
Body: Hastelloy, Monel, Titanium, A20.
Trim: Hastelloy, Monel, Titanium, A20.
Teflon-Viton composite reinforced diaphragm is designed for much greater main valve travel than models designed with stainless steel diaphragms. When a Teflon diaphragm is ordered, the Teflon film on the wetted side provides good corrosion resistance for a wide range of fluids and gases including steam. Viton is the elastomeric seal on the non-wetted side. Max temperature rating is 350 °F. Special elastomers are also available. Other diaphragm materials are available.
Right-angle porting is the standard piping arrangement which allows the valve to be self-draining.
Stainless Steel Bypass Valve model is also available.

This is a direct-acting valve with an adjustable spring operating against a flexible elastomeric diaphragm subjected to the inlet pressure of the valve. Increasing the spring compression will increase the system or line pressure to be maintained. Reducing the spring compression will reduce the system or line pressure to be maintained. An increase in system pressure beyond the set point will cause the main valve to open and relieve the excess pressure.

BPS-09-Npt-EX

Material List and Specification

#	Item	Materials
1.	Adjusting screw	ST. Steel & Upgrade
2.	Lock nut	ST. Steel & Upgrade
3.	Spring chamber	ST. Steel & Upgrade
4.	Spring pusher	ST. Steel & Upgrade
5.	Spring	ST. Steel & Upgrade
6.	Lock nut	ST. Steel & Upgrade
7.	Lock washer	ST. Steel & Upgrade
8.	Spring follower	ST. Steel & Upgrade
9.	Diaphragm	TFE / Viton
10.	Diaphragm disc.	Hastelloy, Monel, Titanium, A20
11.	Main valve	Hastelloy, Monel, Titanium, A20
12.	Body	Hastelloy, Monel, Titanium, A20

Alternate elastomers available
Max inlet pressure 75 PSI (5.2 Bar) based on diaphragm rated press. Diaphragm min burst pressure at ambient temp is 300 psi (20 bar)

Dimensions (NPT)

A	B	C	D	E
1/4	2.75	2.50	1.00	6.25
3/8	2.75	2.50	1.13	6.50
1/2	2.75	2.50	1.31	8.25
3/4	2.75	2.50	1.50	9.50
1	4.00	4.50	2	12.38
1-1/4	4.50	4	3.44	13.25
1-1/2	4.50	4.00	3.56	16.56
2	5.00	4.50	4.13	17.25

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

BPS-09-Npt-EX Back Pressure Reducing Valve

BPS-09-Npt-EX Back Pressure Reducing Valve

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Applications

Features

Principle of Operation

Dimensions/Material Item List