Pressure Reducing Station

Steam should be distributed at high pressure as it has low volume and impacts the inventory and its cost. At the same time it should be used at low pressure, as it has high latent heat at low pressure .Thus the function of lowering the pressure at the point of use is done by the PRS [Pressure Reducing Station]

This is done by a number of individual components arranged in a modular form called as a station.

Return On Investment

All the components, Valves, Separators, Trap modules, piping elements etc are manufactured by UKL and provided as a complete PRS, to give optimum results for effective steam utilization.

The UKL Pressure Reducing Station is optimally sized to ensure a balanced techno-economic design. Use of Klinger Piston Valves for isolation, will eliminate valve passing & leaking problems. Available with self actuated PRV as well as with externally Pneumatic Control valves.

Sizes range from 15 mm to 200 mm.

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FAQ

UPRS

UKL Pressure reducing station in carbon steel construction as per ASTM A216 Gr WCB

Metric
Imperial

Size (NB)

Max. Op. Pr / Temp (kg/cm2 / oC)

End connections

Optional /Additional information

15 to 400

40 / 425

Screwed-BSP/BSPT/NPT

Socket weld

Flanged #150/#300(weld-on)

IBR/Non-IBR

Higher pressure ratings

Datasheet (Metric)

1. What is a Pressure reducing station?

A Pressure reducing station is a device which reduces the media pressure from high value to low value.

2. What is the need of installing a pressure reducing station(PRS)?

There are many reasons of installing a PRS. Few reasons are listed below:
1. Latent heat of saturated steam is higher at lower pressure
2. It can help to precisely meet the design conditions of various equipments
3. Practically boilers cannot be run on lower pressure, so often need arises to reduce the pressure
4. Many times, it is required to induce higher safety at lower pressure

3. What are the main parameters required for sizing the PRS?

Below are the main parameters for designing a PRS,
1. Name of media
2. Inlet pressure range (Min/Nor/Max)
3. Outlet pressure range (Min/Nor/Max)
4. Flow rate (Min/Nor/Max)

4. List down all the components of a PRS

A Pressure reducing station comprises of below components:

1. Moisture separator (For saturated steam)
2. Inlet isolation valve
3. Strainer
4. Control valve(Pressure reducing valve)
5. Downstream isolation valve
6. Safety valve
7. Pressure gauges at inlet and outlet

5. Type of Pressure reducing valve in PRS

1. Non Pilot, direct acting valve: - Adjustment spring places downward pressure setting force directly on the main valve.
2. Pilot Operated Valve: - Adjustment spring places downward pressure setting force directly on a pilot valve, which is smaller and different from the main valve

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