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Singer Valve - Model 106/206-RPS-D -Pressure Differential Sustaining Valve
The 106-RPS-D and 206-RPS-D pressure differential sustaining valves are based on the 106-PG or 06-PG main valve. The RPS-D uses the 81-RPD pilot valve and has two sensing connections. The valve and pilot remain closed until the difference between the two pressures exceeds the pilot setting. Under flowing conditions, the pilot reacts to small changes in pressure to control the valve position by modulating the pressure above the diaphragm. The pilot setting establishes a differential pressure that is held relatively steady despite changes in system pressure or flow.
- Maintains a minimum differential pressure
- Easily adjustable differential pressure setting
- Valve closes drip-tight when the pressure differential is less than the pilot setting
Parallel Application
As the number of operating heat exchangers in the circuit vary, the Singer RPS-D maintains a relatively steady differential for maximum chiller efficiency.
Series Application
In a booster pump application, the Singer RPS-D ensures the pump operates near its best efficiency and without cavitation or overload, should the suction conditions vary.
1. Main Valve - 106-PG or 206-PG
2. Isolation Valve - standard 4 in / 100 mm and larger
3. Strainer - standard 4 in / 100 mm and larger
4. Fixed Restriction - 1/8 in / 3.2 mm
5. Model 852-B Closing Speed Control
6. Model 81-RPD Pilot
- Specify for 5 to 50 psi / 0.35 to 3.5 bar, 10 to 80 psi / 0.70 to 5.5 bar, 20 to 200 psi / 1.3 to 13.8 bar, 100 to 300 psi / 6.9 to 20.7 bar.
7. Isolation Valve - standard 4 in / 100 mm and larger
8. Isolation Valve - standard all sizes
9. Opening Speed Control (optional)
Standard materials for pilot system components are:
- ASTM B-62 bronze or ASTM B-16 brass
- AISI 316 stainless steel trim