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Singer Valve - Model 106/206-PFC -Pressure Flow Control (Modulation) Valve
The 106-PFC / 206 PFC Pressure Modulation Valve is a pressure reducing valve with a special (Patented) pilot that increases downstream pressure as flow increases. The PFC valve alters and controls pressure with flow to create virtually constant pressure at the critical pressure point in a system. It will also automatically adjust for distribution friction losses. The PFC valve will deliver consistent performance as it has no electrical components and is not affected should the valve chamber be flooded. The valve may be used wherever a standard PRV is installed.
Please note that the downstream (controlled) pressure increases from low flow to selected maximum flow but reduces at flows higher than the selected maximum. This is due to the increased pressure drop of the orifice plate. If this reduction of the controlled pressure past the design maximum flow is a problem, contact Singer Valve or your Singer Valve representative for an engineered solution.
An orifice plate immediately downstream of the PFC Control Valve produces 3 psi / 0.2 bar pressure drop, at maximum flow. This pressure differential is applied to each side of an actuating diaphragm which is connected to the yoke of the pressure reducing pilot. Increasing the differential raises the pilot setting and raises downstream pressure to maintain virtually steady pressure on a critical distance user.
- Reduces pressure when demand is lower resulting in reduced leakage losses and pipe breaks
- Compensates for pressure loss in a long pipeline to deliver virtually constant pressure at all times at a distant point
- Simple to set-up and adjust
1. Main Valve - 106-PG or 206-PG
2. Isolation Valve (2A, 2B, 2C)
3. Strainer - 40 Mesh
4. Model 26 Flow Stabilizer / Opening speed Control
• Standard on 8” (200 mm) 106 / 10” (250 mm)
206 and smaller
• Optional on 10” (250 mm) 106 / 12” (300 mm)
206 and larger
5. Fixed Restriction
6. Model 160-PFC Pressure/Flow Control Pilot
7. Orifice housing and plate
8. Test Valve
9. Speed Control
10. Fixed Restriction
11. PIP Adjustment - Model 852-B
