Relief / Sustaining / Surge

A106-DL-Air / A106-DL-ET

Dynamic Lifter Air Operated Pressure Relief Valve
Surge Anticipating Electronically Timed DL Pressure Relief Valve

  • A106-DL-Air:
    • Eliminates surges and prolongs pipe life
    • Handles higher pressure applications effectively
    • Adjustable closing speed
    • Utilizes compress air or plant air
    • Smaller profile allows installation into limited space
    • Ideal for higher pressures
  • A106-DL-Air-ET:
    • All key features of the A106-DL-Air
    • Solenoid valve anticipates surges resulting from power failures

The Model A106-DL-Air is a compact sewage relief valve that is suitable for high pressures up to 200 psi, responds very quickly and retains all the features and benefits of the Model A106-DL Spring– Hydraulic version. It is an attractive solution to what may be otherwise a difficult application due to higher pressures or space height limitations.

The Model A106-DL-Air-ET retains all the features and benefits of the Model A106-DL-Air with the additional feature of two 3-way solenoid valves which forces the valve open upon power failure.

  • The anticipating sewage pressure relief valve shall be compressed air actuated, angle style and open fully and quickly on power failure or when the system pressure exceeds the valve set-point.
  • The closing speed is to be adjustable. The valve shall close drip-tight when system pressure is below the valve set-point.
  • A separation chamber and diaphragm shall transmit the system pressure (using mineral oil) to a relatively accurate but easily adjustable hydraulic pilot.
  • Compressed air will be supplied by others at a pressure exceeding 100 psi / 6.9 bar to actuate a piston to close the valve.
  • Sewage system pressure above the set-point shall cause the pilot to release air from the chamber that holds the sewage relief valve closed.
  • For a complete maintenance check it shall be possible to apply pressure to the separation chamber and check the opening pressure of the hydraulic pilot and the main valve.
  • A separate means of lowering the air pressure in the main chamber is to be provided for a quick flush cycle. It shall assist in flushing drypack on the downstream side of the valve. The maintenance testing is to be clean and sanitary.
  • The construction is to be suitable for long life when used in a raw sewage environment.
  • Prior to shipping the standard Singer Valve tests shall include cycling at full stroke at the requested relief setting, drip-tight leakage test and over pressure shell test of both the valve and air chamber.
  • The Sewage Relief Valve shall be ANSI Class 150 (PN 16) flanges, Size ___ in / ___ mm.
  • Operating relief range ___ psi / ___ bar to ___ psi / ___ bar with air supply between 100 psi / 6.9 bar and 150 psi / 10.35 bar.
  • The valve shall have all the features and functions of the Singer Model A106-DL-Air / Singer Model A106-DL-Air-ET or approved equal.

For the Singer Model A106-DL-Air-ET, utilize the above specifications and include this additional specification:

  • Two solenoid valves and a panel will be used to open the valve on power failure. The panel will close the valve after an adjustable time period.

A106-DL

Dynamic Lifter Spring Pressure Relief Valve

  • Low maintenance
  • Hygienic and minimal time to flush and test operations
  • Premium materials reduce maintenance, providing the lowest long-term cost of ownership

The A106-Dynamic Lifter (DL) sewage pressure relief valve is a direct acting spring loaded relief valve.

The valve is adjusted to open when the pressure exceeds the set-point, which is approximately 10% above the normal operating pressure. The valve closes drip-tight when pressure falls below the set-point. The DL is connected on a tee off the main line and usually discharges relief flow back to the main sump to reduce the surge over-pressure. A speed control permits adjustment of the closing speed.

The opening force is boosted by the line pressure operating, via the separation chamber, on the piston. By applying external pressure to the test connection, the valve may be cycled open for routine maintenance.

Ideal for:
• raw water that contains organics
• lower pressure sewage lift stations
• booster sewage stations

  • The sewage pressure relief valve shall be direct acting spring loaded angle style and shall open fully and quickly when the system pressure exceeds the valve set-point.
  • The closing speed shall be adjustable. The valve is to close drip-tight when pressure is below the set-point.
  • A separation chamber and diaphragm shall transmit pressure to an opening piston to assist the opening forces.
  • Provision shall be made to readily connect external pressure and test cycle the valve opening to confirm the opening and closing, and the relief pressure. It will flush out materials that may be clogging the valve flow or causing a sticking stem or preventing drip-tight closing. It shall assist in flushing drypack on the downstream side of the valve. The maintenance test is to be clean and sanitary.
  • The construction is to be suitable for long life when used in a raw sewage environment.
  • Prior to shipping the standard Singer Valve test shall include cycling at full stroke at the requested relief setting, drip-tight leakage test and over pressure shell test.
  • The Sewage Relief Valve shall be ANSI Class 150 / PN 16 flanges size ___ in / ___ mm. Spring range ___ psi / ___ bar to ___ psi / ___ bar Singer Valve set at ___ psi / bar. The valve shall have all the features and functions of the Singer Valve Model A106-DL or approved equal.

106 / 206-RPS Relief

Pressure Relief Valve

  • Limits system pressure by relieving excess flow
  • Quick opening relief
  • Easily adjustable pressure setting

The 106-RPS and 206-RPS pressure relief valves are based on the 106-PG and 206-PG main valves.

The 81-RP pilot senses the upstream pressure through a connection to the valve inlet. The valve and pilot remain closed until the inlet pressure exceeds the pilot setting. The valve opens rapidly to relieve damaging overpressure and closes smoothly at an adjustable speed, when the pressure returns below the set-point. The upstream pressure is limited to the pilot set-point.

  • The valve shall be a Singer Valve model 106-RPS / 206-RPS, size “_____”, ANSI Class 150 (ANSI 300, ANSI flanges drilled to ISO PN 10 / 16/ 25 or 40) pressure rating / flange standard, globe (angle), style valve. The Model 81-RP Pressure Relief Pilot (Normally Closed Pilot) spring range shall be “___ to ___” psi / bar, with set-point preset at Singer Valve to “___” psi / bar. Assembly shall be according to Schematic A-0423F.
  • The valve shall remain closed until inlet pressure exceeds a pre-determined set- point at which time the valve opens quickly and modulates to limit the upstream pressure to the pre-determined set-point.
  • Refer to Main Valve section page 11, 106-PG (or 206-PG) for detailed information pertaining to valve sizes and materials, selection criteria and specifications.
  • Refer to Pilot and Accessories section, page 249, Model 81 Pressure Relief Pilot (Normally Closed Pilot) for detailed information pertaining to materials and specifications.

Note

  • Where UL / FM designation is required, specify 106-RPS-8700A. Available in 2-1/2 in / 65 mm to 8 in / 200 mm globe and angle configurations, ANSI 150 and ANSI 300 flanges, and grooved end connections.

106 / 206-RPS Sustaining

Pressure Sustaining Valve

  • Ensures minimum upstream pressure for critical use
  • Easily adjustable pressure setting
  • Closes if inlet pressure drops below set-point

The 106-RPS and 206-RPS pressure sustaining valves are based on the model 106-PG or 206-PG main valve.

The 81-RP pilot senses the upstream pressure through a connection to the valve inlet. The valve and pilot remain closed until the inlet pressure 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.

Should the upstream pressure fall below the set-point, the valve will close or modulate to ensure that the set-point is maintained.

  • The valve shall be a Singer Valve model 106-RPS / 206-RPS, size “_____”, ANSI Class 150 (ANSI 300, ANSI flanges drilled to ISO PN 10 / 16/ 25 or 40) pressure rating/ flange standard, globe (angle), style valve. The Model 81-RP Pressure Relief Pilot (Normally Closed Pilot) spring range shall be “___ to ___” psi / bar, with set-point preset at Singer Valve to “___” psi / bar. Assembly shall be according to Schematic A-0423F.
  • The valve shall maintain a minimum pre-determined upstream pressure. When the actual upstream pressure meets the minimum allowable pre-determined upstream pressure setting the valve will either close or modulate in order to maintain the minimum allowable upstream pressure.
  • Refer to Main Valve section, page 11, 106-PG (or 206-PG) for detailed information pertaining to valve sizes and materials, selection criteria and specifications.
  • Refer to Pilot and Accessories section page 249, Model 81 Pressure Relief Pilot (Normally Closed Pilot) for detailed information pertaining to materials and specifications.

106 / 206-RPS-RR

Surge Anticipating on Rate of Rise of Pressure Relief Valve

  • Protects against power failure surges or pressure waves caused by velocity changes
  • Unaffected by header pressure and over sizing
  • Quick opening relief
  • Easily adjustable pressure setting
  • No electrical services required

The 106-RPS-RR and 206-RPS-RR surge anticipating relief on rate of rise valves are  based on the 106-PG or 206-PG main valve.

The valve is installed downstream of the pump check valve(s) and has two pilots, the 81-RP and the 81-RPD. Both pilots sense pressure through a connection to the header pipe. The 81-RP high pressure pilot acts as a standard relief pilot, opening on excessive pressure. The 81-RPD differential pilot responds to the pressure differential across its diaphragm. A pressure differential is created when there is a system pressure increase. The flow into the accumulator creates a pressure drop across the fixed restriction, which lowers the pressure in the connection between the fixed restriction and the pilot.

The pilot senses the pressure difference between this lower pressure and the header pressure. This difference occurs at the initiation of the pressure surge, providing the time necessary for the valve to open in anticipation of the high pressure.

  • The valve shall be a Singer Valve model 106-RPS-RR / 206-RPS-RR, size “_____”, ANSI Class 150 (ANSI 300, ANSI flanges drilled to ISO PN 10 / 16/ 25 or 40) pressure rating / flange standard, globe (angle), style valve. The Model 81-RP Pressure Relief Pilot (Normally Closed Pilot) spring range shall be “___ to ___” psi / bar, with set-point preset at Singer Valve to “___” psi / bar.
  • Assembly shall be according to Schematic A-7340F, 2 in / 50 mm to 6 in / 150 mm 106, and 3 in / 75 mm to 8 in / 200 mm 206 (for A-7340F1 [not shown], 8 in / 200 mm and larger 106). The valve will open rapidly on an over-pressure caused by sudden pump stoppage due to power failure or other means, and other causes of surges in the pipeline.
  • The valve will also anticipate a surge by sensing a rapid increase in pressure as the surge wave returns and opens fully with no stroke limiters on the valve opening.
  • The valve will begin slowly closing when the system pressure falls below the high pressure set-point of the valve piloting until it fully closes regardless of static pressure in the pipeline.
  • Refer to Main Valve section, see page 11, 106-PG (or 206-PG) for detailed information pertaining to valve sizes and materials, selection criteria and specifications.
  • Refer to Pilot and Accessories section, see page 249, Model 81 Pressure Relief Pilot (Normally Closed Pilot) and Model 81-RPD Differential Pressure Pilot for detailed information pertaining to materials and specifications.

106 / 206-RPS-L&H

Surge Anticipating Relief Valve

  • Protects against power failure surges or pressure waves caused by velocity changes
  • Quick opening relief
  • Easily adjustable pressure setting
  • No electrical services required

The 106-RPS-L&H and 206-RPS-L&H anticipating surge relief valves are based on the 106-PG or 206-PG main valve.

The valve is mounted in a tee, downstream of the pump check valve(s). It is designed to anticipate surges to avoid the severe water hammer often associated with power failure surges.

The RPS-L&H pilot system is comprised of two pilots, the 81-RP and the 82-PR. Both pilots sense pressure through a connection to the header pipe. The 81-RP high pressure pilot opens the valve to relieve excess pressure. The model 82-PR low pressure pilot opens quickly on below normal pressures prior to the return of a surge wave, initiating the opening of the main valve in anticipation of the high pressure wave’s arrival.

  • The valve shall be a Singer Valve model 106-RPS-L&H / 206-RPS-L&H, size “_____”, ANSI Class 150 (ANSI 300, ANSI flanges drilled to ISO PN 10 / 16/ 25 or 40) pressure rating / flange standard, globe (angle), style valve. The Model 81-RP Pressure Relief Pilot (Normally Closed Pilot) spring range shall be “___ to ___” psi / bar, with set-point preset at Singer Valve to “___” psi / bar. The Model 82-PR Low Surge Pilot spring range shall be “___ to ___” psi / bar, with set-point preset at Singer Valve to “___” psi / bar. Assembly shall be according to Schematic A-0400C, 6 in / 150 mm and smaller (A-0401C, 8 in / 200 mm and larger).
  • The valve is closed when line pressure is between the set-points of the two pilots. The valve opens initially when line pressure drops below the setting of the low-pressure pilot to anticipate surges associated with a pump stopping. The valve will also continue to react and remain open when the return high-pressure wave is above the setting of the high-pressure pilot or will open when inlet pressure exceeds a pre-determined set-point at which time the valve opens quickly.
  • Refer to Main Valve section, see page 11, 106-PG (or 206-PG) for detailed information pertaining to valve sizes and materials, selection criteria and specifications.
  • Refer to Pilot and Accessories section, see page 249, Model 81-RP Pressure Relief (Normally Closed Pilot) for detailed information pertaining to materials and specifications. Model 82-PR Low Surge Pressure Pilot specification information is available from Singer Valve only at this time.

106 / 206-RPS-D

Pressure Differential Sustaining Valve

  • Maintains a minimum differential pressure
  • Easily adjustable differential pressure setting
  • Valve closes drip-tight when the pressure differential is less than the pilot setting

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.

  • The valve shall be a Singer Valve model 106-RPS-D / 206-RPS-D, size “_____”, ANSI Class 150 (ANSI 300, ANSI flanges drilled to ISO PN 10 / 16/ 25 or 40) pressure rating / flange standard, globe (angle), style valve. The Model 81-RPD Differential Pilot spring range shall be “___ to ___” psi / bar, with set-point preset at Singer Valve to “___” psi / bar. Assembly shall be according to Schematic A-0428B.
  • The valve will automatically open when the pressure differential across the valve exceeds the pilot set-point. 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, which is held relatively constant despite changes in system pressure or flow.
  • Refer to Main Valve section, see page 11, 106-PG (or 206-PG) for detailed information pertaining to valve sizes and materials, selection criteria and specifications.
  • Refer to Pilot and Accessories section, see page 249, Model 81-RPD Differential Pressure Pilot for detailed information pertaining to materials and specifications.
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