Page 5 - BEST-Accessory-Technical-Bulletins

Electrical Wiring & Connections Model Number Matrix

Configuration CD Model # EPSK - CD - E
Model Prefix
EPSK - Enclosure Pressure Switch Kit
Low
Pressure Configurations
Port
CD - Model 1950-00-2F Pressure Switch
Rating: Class I, Division 1, Groups C & D
Calibration Class II, Groups E, F & G
Screw Switch: Form C Dry Contact
High B24 - Model 1950G-00-B-24-NA Pressure Switch
Pressure Rating: Class I, Division 1, Groups A, B, C & D
Port Switch: 24 VDC Powered Form C Dry Contact
B120 - Model 1950G-00-B-120-NA Pressure Switch
Conduit Port Rating: Class I, Division 1, Groups A, B, C & D
Switch: 120 VAC Powered Form C Dry Contact
Configurations B24, B120 & B240
B240 - Model 1950G-00-B-240-NA Pressure Switch
Rating: Class I, Division 1, Groups A, B, C & D
Switch: 240 VAC Powered Form C Dry Contact
Low
Pressure Switch Location
Port
E - Exterior Surface I - Interior Surface

Calibration Compatibility Chart
Screw
High
Pressure Switch Configurations: CD B24 B120 B240
Port
Model 101A X
Type Y or Z
Conduit Port Class I, Div. 1 or 2 Groups C & D
Class II, Groups E, F & G
Dimensions & Installaton Options Models 101B & 101C X
Type Y or Z
External Installation Class II, Groups E, F & G
Vent in Low Port Models 101A, 102, 103 & 104 X X X
Type Y or Z
Flush Connector
SWITCH to Enclosure Class I, Div. 1 or 2
Groups A, B, C & D
Male Connector
in High Port
Material Specifications

Pressure Switch
Internal Installation Body & Cover: Cast Aluminum
Male Connector Electrical Housing Rating: NEMA 3, 7 & 9, (IP 54)
in Low Port
Cover Bolts & Vent Drain Plug: Zinc Plated Steel
SWITCH Female Bulkhead Diaphragm & Cover O-Ring: BUNA “N” Nitrile
to Enclosure Contacts: 10G Mica Silver
Vents in High Port Calibration Range: 0.07” to 0.15” W.C.
and Bulkhead
Connector
Accessory Kit
IMPORTANT WIRING & INSTALLATION NOTES Fitting Bodies & Ferrules: 316 Grade Stainless Steel
Configuration CD features a Form C Dry Contact that is operated Fitting Nuts: Molybdenum disulfide
mechanically. Configurations B24, B120 & B240 require power to operate. coated 316 Stainless Steel
Atmospheric Reference Vent must not be subjected to rain, hose-down or Atmospheric Reference Vent: 316 Grade Stainless Steel
excessive dust. If mounted externally, it may be essential to orient switch
vent drain plug downward, to prevent internal condensation accumulation. Mounting Hardware: 316 Grade Stainless Steel
Specifications subject to change without notice, warranty & liability statements available upon request.

Best Purging Systems Corporation www.purgeit.com 4725 Lawndale • La Marque, Texas 77568 Phn: 844.PURGE IT