Diaphragm Sealed Piston
Rugged in construction, supreme in performance the S20 and 920 series pressure switches are designed as cost effective solutions to meet a variety of applications in the oil, gas, power, steel, Nuclear energy and petrochemical industries.
The sensing element consists of a time-proven diaphragm sealed piston affording high integrity, reliable switching and a very high overload protection. Variety of combinations in features are available to make it versatile.
GENERAL SPECIFICATIONS
Enclosure
GM:Aluminium pressure die cast weatherproof to IP:66GA4:304SS investment cast weatherproof to IP:66
GA6:316SS investment cast weatherproof to IP:66
GK:Aluminium die cast, weatherproof to IP:66 and flameproof to Gr.IIA, IIB or IIC (Note 1)
GH:Aluminium pressure die cast weatherproof to IP:66
Ranges:(–)1 to 700 bar -several std. ranges. Refer Table–1
Sensor:316L SS Diaphragm-sealed piston std. Monel optional
Wetted Parts
Diaphragm Housing:316L SS Diaphragm-sealed piston std. Monel optionalDiaphragm Seals:Nitrile – Std ; EPDM /Teflon / Viton ® – Optional
Repeatability:± 1 % FSR (Note 4)
Scale Accuracy:± 5 % FSR (for GH only) (Note 6)
Mounting:Direct or Wall
Max. Working Pr:Refer tables ‘A’ & ‘B’
Max. Working Temp– 20 to + 80°C for all ranges except
– 20 to + 60°C for ranges U7, V7, W7 & Y4 (Note 14)
Switching ElementInstrument quality snap-acting SPDT microswitch
Differential Connection ProcessFixed; for values refer tables ‘A’ & ‘B’1/4" NPTF Std., 1/2" NPTF on request others through Adaptor
Electrical GM / GA4 / GA63/4" ETF std; 1/2" NPTF optional. Dual entry on request.
GK 1/2" NPTF std. Dual entry on request.
GH 3/4" ET Nylon cable gland std.
Conformity Generally to BS : 6134 : 1991
Mounting Dimensions
