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Model BPS-09 |
BACK PRESSURE-REDUCING VALVE |
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Features
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Applications
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. In-line strainer fittings or 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.
Options
Principle of Operation
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.
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| BPS-09 |
| 1. | Adjusting screw | Steel | |
| 2. | Lock nut | Steel | |
| 3. | Spring chamber | Steel | |
| 4. | Spring pusher | Steel | |
| 5. | Spring | Steel | |
| 6. | Lock nut | Steel | |
| 7. | Lock washer | Steel | |
| 8. | Spring follower | Steel | |
| 9. | Diaphragm | TFE / Viton | |
| 10. | Diaphragm disc. | Stainless steel | |
| 11. | Main valve | Stainless steel | |
| 12. | Body | Stainless steel |
- 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.
To show prices: Click on a size: |
1/4" BPS09-02T | 3/8" BPS09-03T | 1/2" BPS09-05T | 3/4" BPS09-07T |
| 1" BPS09-10T | 1 1/4" BPS09-12T | 1 1/2" BPS09-15T | 2" BPS09-20T | |
To price or order, first select a size above.
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