Standard Components
Operation
The Solenoid On-Off ACV with Hydraulic Check Feature is de-
signed to open fully or close drip-tight as commanded by the
3-Way Solenoid Pilot, and close drip-tight when downstream
pressure becomes greater than upstream pressure. The Solenoid
Pilot directs upstream pressure into and out of the cover chamber
of the 3-way Accelerator Pilot. When the cover of the Accelerator
Pilot is pressurized, the main valve cover chamber is vented down-
stream (dry drain) or to atmosphere (wet drain), causing the valve
to open fully. When the cover of the Accelerator Pilot is de-pres-
surized, the main valve cover chamber is connected to upstream
pressure, causing the valve to close drip tight. Valve opening and
closing speeds are separately adjustable. Engaging the Solenoid
Manual operator simulates power to the solenoid, manually con-
trolling the main valve. Disengaging the Solenoid Manual operator
returns the valve to electrical on-off service.
1
X
X
X
X
Y/FC
5
P/L
2
4
3
6
6
1. Prior to installation, flush line to remove debris.
2. Install valve so the flow arrow matches flow through the line, and gauges to monitor valve inlet and outlet pressures. A Position
Indicator can be installed to provide visual indication of valve position and operation without disassembly.
3. Install isolation valves upstream and downstream of the main valve.
4. Provide adequate clearance for valve servicing and maintenance. Refer to valve servicing dimensions on next page. Avoid installing
valves 6" and larger in the vertical position (main valve stem horizontal). Automatic Control Valves (ACVs) are designed for horizon-
tal in-line installation, with the cover facing up (main valve stem vertical). Slow operation or premature stem and guide wear may
occur if valve is not installed according to factory recommendations. Consult factory for detailed engineering review prior to order-
ing if valve is to be installed other than horizontally in-line.
5. If valve is equipped with a pilot control system, extra precautions should be made during installation to protect the piping circuit
from damage. Only remove the pilot control system from the valve if necessary. Tubing and fittings should be kept clean and
replaced exactly as removed. Consult appropriate hydraulic schematic to ensure proper re-assembly.
6. Connect solenoid wiring leads to desired switching device, using safe, standard electrical practices.
7. After installation, vent entrapped air from valve cover and pilot system by following instructions on Technical Bulletin.
Start-up of an automatic control valve requires that proper procedures be followed. Time must be allowed for the valve to react to
adjustments and the system to stabilize. The objective is to bring the valve into service in a controlled manner to protect the system
from damaging over-pressure.
If downstream pressure becomes greater than upstream pressure, downstream pressure is admitted to the main valve cover chamber,
closing the valve and preventing reversal of flow. Normal On-Off operation resumes when upstream pressure exceeds downstream pres-
sure.
Specify voltage and MAIN VALVE actuation (energize to open or close), and "wet" or "dry" drain PRIOR to ordering.
1 – Main Valve (905GD - Single Chamber)
2 – Model 22-1 Accelerator Control
3 – 3-Way Solenoid
4 – Adjustable Closing Speed
5 – Adjustable Opening Speed
6 – Check Valve
X – Isolation Cocks
Installation
930GD-01-19 (Globe) Solenoid (On-Off) Control Valve with
Hydraulic Check Feature (6" and Larger)
2 IOM-A-ACV-930-01-19_630-01-19 2115
EDP# 1917086
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