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Type S402Y

7

T80288

Figure 3. 

Type S402Y Pressure Reducing Regulator Assembly

3

11

12

10

7

8

22

1

9

13

4

5

16

- Apply Lub / Sealant

Summary of Contents for S402Y

Page 1: ... procedures for Type S402Y pressure reducing regulators The Type S402Y is typically used in residential or small commercial applications to reduce gas distribution pressures down to a reduced pressure range from 4 5 inches w c to 2 5 psig 11 0 mbar to 0 17 bar The Type S402Y has an integral high capacity internal relief valve Scope of the Manual This instruction manual provides information on inst...

Page 2: ...c to 1 5 psig 32 mbar to 0 10 bar T13564T0012 Unpainted 0 120 3 05 1 93 49 0 1 5 to 2 5 psig 0 10 to 0 17 bar T13536T0012 Blue 0 120 3 05 2 60 66 0 Table 2 Outlet Pressure Ranges and Control Spring Data orifice size orifice color code wide open Cg for relief sizing Maximum operating pressure for optimum performance 1 Inches mm Psig bar 1 8 3 16 1 4 3 2 4 8 6 4 Blue Green Brown 12 5 28 2 50 0 125 8...

Page 3: ... matter lodged between the orifice and the valve disk or a failure in the valve disk the regulator diaphragm assembly moves upwards trying to push the valve disk against the orifice The valve disk and disk holder being pressed against the orifice will prevent the cam stem from being able to travel any further upward in conjunction with the diaphragm assembly The continued leakage of the inlet pres...

Page 4: ...n positions other than vertically down require additional vent protection from the elements Such protection may be with separate hood shields or the Fisher Y602 Series vents 4 Regulator operation within the ratings does not preclude the possibility of damage from the debris in the lines or from external sources A regulator should be inspected for damage periodically and after any overpressure cond...

Page 5: ...et pressure to prevent damage caused by reverse pressurization of the regulator The steps below apply to the typical installation as indicated 1 Slowly close the upstream shutoff valve 2 Release downstream pressure and be sure the upstream pressure has been exhausted Maintenance Warning To avoid personal injury or equipment damage from sudden release of pressure or uncontrolled gas do not attempt ...

Page 6: ...mbly by tilting it toward the outlet so that the cam stem may be pulled up and out of the orifice tube assembly key 7 5 Reassemble in the reverse order of the above procedures Place the diaphragm assembly into position in the lower casing being sure the cam stem key 10 is properly inserted into the orifice tube assembly key 7 Note that the diaphragm plate is marked with Inlet and Outlet Install th...

Page 7: ...Type S402Y 7 T80288 Figure 3 Type S402Y Pressure Reducing Regulator Assembly 3 11 12 6 10 7 8 22 1 9 13 4 5 16 Apply Lub Sealant ...

Page 8: ...0 2445 USA Tel 1 763 241 3238 Europe Selmsdorf Germany 23923 Tel 49 0 38823 31 0 For further information visit www emersonprocess com regulators Recommended spare part Delrin is a mark owned by E I du Pont de Nemours and Co Parts List Key Description Part Number 1 Body Cast Iron No Gauge Tap NPS 3 4 NPT T80281T0012 NPS 1 NPT T80282T0012 Outlet Gauge Tap NPS 3 4 NPT T13649T0012 NPS 1 NPT T13649T002...

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