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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.

Pump Seal system for Russian chemical plant

As part of an upgrade of the Nevinnomyssky Azot urea processing plant in Russia, a new Flowserve pump was required. The steam condensate media and low ambient temperature made it essential for the pump’s shaft seal system to provide accurate regulation of both temperature and pressure. This was because if the temperature of the steam condensate were to drop too low the urea would begin to crystallise, which could damage and ultimately destroy the seal.

The Eagleburgmann seal system installed in this application maintains the shaft seal by holding a greater pressure than that exerted by the steam condensate during all operating conditions. The system was manufactured completely in 316 stainless steel to cope with the corrosive chemical environment in which it operates at the urea processing plant. A Walton temperature control valve was incorporated to control the temperature within the seal housing and media chamber of the pump.

Seal systems are important components of pumps used in petrochemical plants as their failure can result in hazardous situations and damage to equipment, as well as costly downtime.

Walton valves are available in a variety of materials to suit the system requirements. Our range includes different grades of stainless steel, one of which was selected for this demanding application. In the rare cases where a suitable material is not available within our standard product range we can usually produce valves in more specialised materials.

  
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