Automated Pilot Control
The 420-DC or 420-AC provide for a reliable, simple and cost efficient way to automate today’s water systems. A sturdy slow speed 24 VDC motor actuator drive can be installed on a variety of Singer pilots. The motor actuator responds to a 4-20 mA signal, rotating the pilot adjusting screw corresponding to the change in signal. The number of turns is adjustable and may be programmed to suit the pressure changes required for the application.
Typical Applications for a 420-DC/AC:
- Pressure management systems - utilizing pressure reducing pilot to give adjustable pressure settings based on system demand.
- Remote or difficult to reach control valves where adjustments need to be made and using SCADA is the best option.
Motor Pilot Actuator Specifications
Surge Anticipating Panel
The SAP surge anticipator panel provides the interface between a customer supplied, system pressure switch and the Singer surge anticipating control valve. Together they provide protection against destructive pressure surges.
The SAP panel energizes the control valve pilot solenoid on an abnormally low pressure reading and/or power failure to pumps. The 12 VDC pilot solenoid is energized to open the main valve and relieve the surge pressure from the system. The RPS-L&H-ET (ET- Electronically Timed) valve is equipped with a hydraulic pilot to relieve on abnormally high pressures.
The SAP panel is equipped with adjustable digital delay timers that permit coordination of valve operation with pump start-ups, shutdowns, power failures and down surges.
The SAP panel comes equipped with a long life, high capacity 12 VDC battery, industrial grade battery charger with over current and polarity protection, door mounted volt meter and battery test feature. The logical arrangement of indicator lights and the volt meter provide easy supervision of the sequencing and the operating status.
Multi Process Control Panel Series
The MCP-TP Series is a multiple process loop control panel designed to complement the Singer Model 2SC-PCO Dual Solenoid Control Valve. Range of application is dependent on the feedback (process variables) transmitters used, which is similar to (but not limited to) combination automatic control valve functions with conventional pilots.
The MCP-TP control panel has the ability to monitor multiple processes and remotely control the dual solenoid control valve based on system conditions. The MCP-TP control panel can function as a simple single loop controller (e.g., pressure reducing, flow control, level control to multiple loop controller.)
The MCP-TP reads transmitted signals and energizes the dual solenoid pilots on the Singer control valve. The MCP-TP can react to any change in conditions by monitoring the system continuously and comparing actual process values to desired set-point values.
Optional alarm outputs for SCADA is available.
Note: Due to the many different specifications of the MCP, please contact our Customer Service Group to request your Operations Guide.
Dual Solenoid Control for Positioning and SCADA Controls
The Singer models 106-2SC-PCO and 206-2SC-PCO dual solenoid electronic valves are based on the Singer model 106-PG or 206-PG main valve.
The flow into and out of the upper operating chamber is controlled by the two pilot solenoids. The electronic control determines whether the opening solenoid or the closing solenoid is operated. The change in valve position is dependent upon which solenoid is operated and the duration of the energized period.
The electronic control determines the valve function. Virtually any hydraulic function can be achieved using the “open-close” output from the SCADA controller to the valve.
The Singer Model 2SC-PCO is designed for use with Singer MCP Multi-Process Control Panel or the EPC Single-Process Control Panel.
Solenoid Control Valve
Singer models 106-SC and 206-SC solenoid control valves are based on the Singer model 106-PG or 206-PG main valve.
The solenoid pilot valve provides on-off position operation. The solenoid either admits inlet pressure into the main valve operating chamber or releases pressure from the operating chamber. The pilot system is usually piped to discharge at the valve outlet, but can be piped to discharge to drain (atmosphere).
The SC valve is available either with the main valve closed when the solenoid is de-energized (NC -Normally Closed) or with the main valve open when the solenoid is de-energized (NO- Normally Open). (NC or NO refers to the main valve, not the solenoid.)
Dynamic Lifter Air Operated Pressure Relief Valve
Surge Anticipating Electronically Timed DL Pressure Relief Valve
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.
For the Singer Model A106-DL-Air-ET, utilize the above specifications and include this additional specification:
Dynamic Lifter Spring Pressure Relief Valve
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.
• raw water that contains organics
• lower pressure sewage lift stations
• booster sewage stations
Pressure Relief Valve
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.
Pressure Sustaining Valve
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.
Surge Anticipating on Rate of Rise of Pressure Relief Valve
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.