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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.

Flow Rates

Maximum and Minimum Flow Rates for Walton Valves (all flow rates in m3/hr)

  Fresh Water Sea Water & Lubricating Oil
Bore Minimum Maximum Minimum Maximum
25 linear n/a 10 n/a 10
25 rotary 5 10 5 10
40 11 22 8 16
50 17 35 13 26
65 30 60 22 45
80 45 90 33 67
100 50 100 37 75
125 80 160 60 120
150 120 240 90 180
175 165 330 125 250
200 200 400 145 290
250 300 600 225 450
300 350 700 260 520
350 475 950 350 700

These figures are for indication only.  Please contact us with details of your particular requirements.

  
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