Pipeline Ancillaries

SAFETY VALVE | PRESSURE REDUCING VALVE (PRV) | EXPANSION JOINT | STEAM TRAP | BLOW DOWN VALVE

Safety Valve
A safety valve is a safety device designed to protect a pressurized vessel or system during an overpressure event. An overpressure event refers to any condition which would cause pressure in a vessel or system to increase beyond the specified design pressure or maximum allowable working pressure (MAWP).

Pressure-reducing Valve (PRV)
Pressure-reducing valve provide a steady pressure into a part of the system that operates at a pressure lower that normal system pressure. A reducing valve can normally be set for any desired downstream pressure within its design limits. Once the valve is set, the reduced pressure will be maintained regardless of changes in the supply pressure and system load variations.

Expansion Joint
Expansion joints are used in piping systems to absorb thermal expansion or terminal movement where the use of expansion loops is undesirable or impractical. Expansion joints are available in many different shapes and materials.

Steam Trap
A steam trap is a device used to discharge condensates and non-condensable gases with a negligible consumption or loss of live steam. Most steam trap are nothing more than automatic valve. They open, close or modulate automatically. The three important functions of steam trap are:

1. Discharge condensate as soon as it is formed (unless it is desirable to use the sensible heat of the liquid condensate)
2. Have a negligible steam consumption (i.e. being energy efficient)
3. Have the capability of discharging air and other non-condensable gases.

Blow Down Valve
Boiler blowdown is water intentionally wasted from a boiler to avoid concentration of impurities during continuing evaporation of steam. The water is blown out of the boiler with some force by steam pressure within the boiler.