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Direct operated valves

Direct operated valves

incorporate a temperature sensor inside the valve, and operate independently of external power supplies.

Electrically operated valves

Electrically operated valves

are powered by an external electric actuator, with control provided by a separate electronic control unit, and temperature sensing by resistance thermometer.

Pneumatically operated valves

Pneumatically operated valves

are powered by an external pneumatic actuator, with control provided by a pneumatic controller with external temperature sensing.

Gas operated valves

Gas operated valves

are designed to control refrigerant gas pressures – and hence the temperature of refrigerated or air-conditioned areas – in marine systems in which the condenser is cooled by sea water.

Chilled water system for Type 23 Frigate

The Type 23 Frigate is the backbone of the Royal Navy's fleet, with 13 ships currently in service (three having been sold to the Chilean Navy). Each vessel is fitted with a range of sophisticated electronics including Plessey Type 996(I) radar and Ferranti/Thomson Sintra Type 2050 sonar.

Chilled water system for Type 23 FrigateWalton's electrically operated valves are installed on the chiller systems of these ships, and help regulate the temperature of this equipment.

The final vessel of the class, H.M.S. St Albans, was commissioned in June 2002 and shares its name with the home of the Walton valve.

  
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