SDP143

Pilot Operated Pressure Surplussing Valve with Cast Steel Body

SDP143 Pilot Operated Pressure Surplussing Valve with Cast Steel Body

SDP143 Pilot Operated Pressure Surplussing Valve with Cast Steel BodyThe SDP143 is a cast steel pilot operated pressure surplussing valve suitable for steam, air and industrial gasses (Note: It is not suitable for oxygen service).
The SDP143 controls by sensing the upstream pressure through a pressure sensing pipe taken from the union 29 which is clearly identified on page 5.

Standards
This product fully complies with the requirements of the EU Pressure Equipment Directive 2014/68/EU and carries the mark
when so required.

Certification
This product is available with certification to EN 10204 3.1.
Note: All certification/inspection requirements must be stated at the time of order placement.

DN15LC – Low Capacity version, DN15, DN20, DN25, DN32, DN40, DN50 and DN80.

Flanged to EN 1092 PN40, BS 10 Table ‘J’, ANSI 300 and ANSI 150.

The Kv maximum values shown below are full capacities and should be used for safety valve sizing purposes only.

DN15LC DN15 DN20 DN25 DN32 DN40 DN50 DN80
1.0 2.8 5.5 8.1 12.0 17.0 28.0 64.0

For conversion:
Cv (UK) = Kv x 0.963
Cv (US) = Kv x 1.156

SDP143 Pilot Operated Pressure Surplussing Valve with Cast Steel Body

No. Part Material
1 Adjustment screw Steel BS 3692 Gr. 8.8
2 Adjustment lock-nut Steel BS 3692 Gr. 8
3 ‘C’ washer Stainless steel BS 1449 304 S16
4 Spring housing Cast steel DIN 17245 GS C25
5 Top spring plate Steel BS 970 220 Mo7
6 Pressure adjustment spring Stainless steel BS 2056302 S25
7 Bottom spring plate Steel BS 970 220 Mo7
8 Spring housing Securing nuts Steel BS 3692 Gr. 8
Securing studs Steel BS 4439 Gr. 8.8
DN15 to DN80 M10 x 30 mm
9 Pilot diaphragm Stainless steel BS 1449 316 S31
10 Pilot valve housing Steel DIN 17245 GS C25
GP 240 GH + N
11 Pilot valve plunger Stainless steel BS 970 431 S29
12 Spring housing cover Stainless steel BS 1449 304 S12

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