Service regulator (SR) Modules

Service regulator modules are widely used to control the operational pressure of the gas. Service regulator working is reduce a supply (or inlet) pressure to a lower outlet pressure and work to maintain this outlet pressure despite fluctuations in the inlet pressure. The reduction of the inlet pressure to a lower outlet pressure is the key characteristic of pressure regulators.When choosing a pressure regulator many factors must be considered. operating pressure ranges for the inlet and outlet, flow requirements.

Service Regulator modules is a Single Stage pressure regulator with spring control & diaphragm with inbuilt pressure balance regulating unit to ensure a constant outlet pressure .they are operate with a maximum inlet pressure of 0.5 Bar(g) to 6 bar (g) & nominal outlet pressure of 100 mbar(g), 300mbar(g) with different flow rates of 10,25,40,65,80,100,200 SCMH. The module shall be used for low-pressure supplies of natural gas to domestic & some non-domestic loads

A Service regulator has both Over‐pressure (160 ± 5 mbar(g)) and Under‐pressure Slam shut devices (50 ± 5 mbar(g)).The over pressures device protects the downstream from over pressurization and the under pressurization device protects the upstream from air ingress and to maintain a positive gas pressure.

Service Regulators (SR)  are installed at appropriate locations within respective customers’ premises. The SR regulates the pressure from 4 Bar to 100 Mbar, which is further distributed through smaller dia PE pipes i.e. size of 20, 32, 63 mm forming the LP network.

Following main components Service Regulator modules 

a) A medium pressure Service Regulator (SR) with integral slam shut valve, & creep relief with Pressure and Flow rates. 

b) Piping : IS 1239, Heavy Class.

c) Ball Valves up to 2" Dia. BS EN 331,Manually operated ball valves and closed bottom taper plug valves. 

d) IS 1239 (PART 2) Steel Tubes, Tubular and Other Wrought Steel Fittings - Specification - Part 1 : Mild Steel Tubular and other wrought steel pipe fittings

Service Regulator modules Specification

VALVE :

Valve sizes shall be compatible with regulator and size of pipe work used. The module shall be fitted with inlet & outlet isolation valve & there shall be the points for inlet / outlet pipe connections. The valve shall be quarter turn ball valves, manufactured to the technical requirements of EN 331 & suitable for use with natural gas at operating pressures up to 4 bar (g). 

FILTER :

A filter shall be fitted upstream of the pressure regulator  with a removable element of mesh size 80 microns. The filter shall be fitted in such a way that the filter can be removed with the filter body still in line & it may be a ‘Y’ or an angle type . The filter should be suitable for use with natural gas at operating pressure of up to 4 bars. The filter body should have screwed connections to ISO 7 Part 1: 1994. Material shall be forged carbon steel as per ASTM A105: 2011 (latest) protected against corrosion by galvanizing as per IS 4759: 1996 latest” with adequate corrosion resistance coating

FITTINGS:

Fittings used shall be forged carbon steel as per ASTM A105: 2009 & pipe work shall be as per ASTM A106 (GrB): 2008, schedule 40, & protected against corrosion by galvanizing as per IS 4759: 1996 or by the application of another suitable protective coating. Threads shall be ISO 7 Part 1: 1994 & tapered.

HOUSING:

This Specification covers the requirements of Fiber Reinforced Plastic (FRP) Kiosk used for the Service Regulator Module as housing. The housing for the unit shall be a one-piece fiber reinforced construction (5 mm thick) & with base dimensions to suit with the fabricated module.

FRAME / MOUNTING ARRANGEMENT:

The module shall be mounted on secure welded steel frame using pipe clamps at the approximate positions . frame design & clamps used shall be rigid so that any movement due to loading from internal gas pressure or accidental impact is restrained. The pipe work shall be protected from damage (to the coating) by the clamps, by the use of rubber or other similar packing materials. The pipe clamp should be removable to allow for subsequent removal of the module from the mounting frame. The base of the frame shall accommodate & firmly secure the proposed housing with a locking arrangement. The housing must be secured in such a way that it is not possible to remove it without using the appropriate key. The frame shall have a leg of angle size 25 mm x 25 mm x 4 mm thick, fitted at each corner for mounting in a concrete foundation. The legs shall extend 350 mm and have a 75 mm square or round (5 mm thick)