We are Manufacturer, Supplier, Exporter, Services Provider of Piston Digital Control Valves and our setup is situated in Pune, Maharashtra, India. Alma Piston Digital Control Valve is a piston type valve, designed primarily for digital control of loading rack application. It is an electrically actuated, hydraulically operated multi-function valve. When used with a flow meter and an electronic batch controller, it can perform local as well as remote controlled precision batching operations. The Piston Digital Control Valve also offers an in-built flow governing function, when used with an electronic batch controller.
The Alma Piston Digital Control Valve works on the principle of "balanced piston".
Piston is always exposed to high upstream pressure from its bottom side, whereas pressure in the piston chamber can be varied with the help of solenoid valves. When pressure in the piston chamber is equal to the high upstream pressure, the top spring acts as a differential force, pushing the piston down on the valve seat and the valve is held tightly-closed.
When pressure in the piston chamber is relieved with the help of solenoid valves, a differential pressure is created across the piston. The high upstream pressure below the piston overcomes the top pressure plus the spring force and pushes the piston up, resulting in valve opening and the flow starts.
The Alma Piston Digital Control Valve basically consists of a spring loaded piston, sliding in the guide liner, and two solenoid valves. Piston chamber formed between the liner and the piston top, is connected to the upstream and downstream pressures by normally open (NO) and normally closed (NC) solenoid valves respectively.
When the Piston Digital Control Valve is used with an electronic batch controller, it can be digitally controlled by operating the solenoid valves through any of these three stages :