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Singer Valve - Model 106/206-PR-48 -Pressure Reducing Valve with Low Flow By-Pass
The 106-PR-48 and 206-PR-48 series pressure reducing valves with low flow by-pass are based on the 106-PG or 206-PG main valve. In addition, a direct acting pressure reducing valve is piped in parallel, using the main valve back port connections. The pilot valve senses the downstream pressure through a connection at the main valve outlet. Under flowing conditions, the pilot reacts to small changes in pressure to control the main valve position by modulating the pressure above the diaphragm. The downstream pressure is maintained relatively steady at the pilot set-point.
The by-pass valve is set 5 psi / 0.35 bar higher than the main valve. Under low flow conditions, the main PR valve closes and the by-pass stays open, controlling the pressure at very low flows without seat chatter.
In typical pressure reducing applications, the reduced port Model 206-PR-48 is often the best selection.
- Maintains stable flow right down to zero
- Precise and reliable pressure setting
- By-pass piped in parallel to reduce space requirements
1. Main Valve - 106-PG or 206-PG
2. Isolation Valves - standard 4 in / 100 mm and larger
3. Strainer - standard 4 in / 100 mm and larger
4.* Model 26 Flow Stabilizer / Opening Speed Control
• Standard on valves 8 in / 200 mm 106, 10” / 250 mm 206 and smaller
5. Fixed Restriction
6. Isolation Valves - standard 4 in / 100 mm and larger
7. Model 160 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 / 1.38 to 13.8 bar,
100 to 300 psi / 6.9 to 20.7 bar.
8. Isolation Valve - standard all sizes
9. Direct Acting by-pass - range 30 – 145 psi / 2.07 – 10 bar
10. Isolation Valve - standard all sizes
Standard materials for pilot system components are:
- ASTM B-62 bronze or ASTM B-16 brass;
- AISI 303 / 316 stainless steel trim