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PEECO Explosion Proof Flow
Switches
For Hazardous Locations with Maximum Allowable Pressure to 600 PSI / CSA Approved
All explosion proof models are rugged, heavy duty units exceeding all UL Code requirements. Each of the four basic styles are adaptable to many other fittings and configurations. Utilizing 1/4" thick Heat treated aluminum cover (shown at right) with 5 fully engaged threads, these units are designed to encapsulate any internal explosion. All explosion proof models meet Class 1, Group D requirements for use in hazardous locations; all NEMA classifications available. The housing & cover are both made of heat treated aluminum T-356 and are epoxy coated (for extra protection). Other classes and groups are available. Conduit outlet: 1/2" NPT on all models; 3/4" and metric sizing available.
- Available
Models:
Style
ET: Screwed Tee Connection (see
picture )
Connection: Screwed Tee.
Standard Size: Specify
Size.
Optional: Socket-Weld,
Butt-Weld.
Line Size: 2" NPT
and under (standard) over 2" NPT (optional).
Also available in low and low-low flow model. (see chart ) (see picture )
Style
EP-F: Flanged Connection (see
picture )
Connection:Flanged*
Standard Size: 2"
150# or 300# R.F.
Optional Size: Any size,
style and rating.
Line Size: 2½"
and up.
*specify distance from face of mounting flange to default i.d. or c/l of pipe and pipe size.
Style
EP-S: Screwed Connection (see
picture )
Connection:
Screwed default Mount.
Standard
Size: 2" NPT
Optional
Size: Any other size.
Line Sizes:
2½" and up.
See Dimensions (176 KB pdf file)
Style
ET-F: Wafer Tee Connection (see
picture ) (see
dimensions )
Connection: Wafer Tee
Standard Size: 2"
150# or 300# R.F.
Optional Size: Any size,
style and rating.
Line Size: 2" and
under (standard) over 2" (optional)
Also available in low and low-low flow models. (see chart )
Standard Material of Construction
Cover: Heat Treated Aluminum 356-T6
Housing: Heat Treated Aluminum 356-T6
Body: Steel (ASTM 108-99 & A29-99)
Bellows: Seamless 321 Stainless Steel
Stem Paddle: 302, 303 Stainless Steel
Bearings: 440C Stainless Steel Micro Ball
Name Plates: Aluminum
Micro Switch: 15A, 125-250-480 VAC SPDT 1/2 A., 125VDC (see optional switches )
Optional Material of Construction
Cover: BY APPLICATION
Housing: BY APPLICATION
Body: 316SS, Teflon, Polypropylene, Kel-F, Kynar, Inconel, PVC
Bellows: Nickel Plated SS, Teflon, Polypropylene, Kynar, PVC
Stem Paddle: MOST METALS, Teflon, Kynar, Polypropylene, PVC
Bearings: 440C Stainless Steel Micro Ball
Name Plates: Stainless Steel
Micro Switch: 400F, 10A. 125 VDC, Hermetically Sealed, Environment Proof, 600 VAC, 25A, DPDT, and many others. Silver Brazing Alloy: Copper - 15.5%, Silver - 50%, ZINC - 16.5%, Cadmium - 18%. Cadmium free AND Copper free Alloys are available
Flow Switch Selection Chart:
Parameters Explosion Proof High Pressure Non-Explosion Proof
Pressure to 600psi
Yes No Yes
Pressure to 10,000psi
No Yes No
Temp. to 300° F (note 1)
Yes Yes Yes
Temperatures to 2000°F
Finned Body Extension Required
Hazardous Locations
Yes Yes
Non-Hazardous Locations (note 2)
No No Yes
Flow Rates
See Flow Rate Page for Details
Screwed Connections
Yes Yes Yes
Flanged (see note 3)
Yes Yes Yes
Tee, Screwed or Wafer Styles
Yes Yes Yes
Welded or Special Duct Mountings
Yes Yes Yes
Multiple Actuation
Yes Yes Yes
Turbulence, Cavitation, Pulsation
Yes Yes Yes
Teflon or other Coatings
Paddle - Stem Yes Paddle - Stem
All Teflon, PVC, Kynar or other
Yes No Yes
All Stainless Steel
Yes Yes Yes
Bronze
Yes Yes Yes
Any Machinable Metal
No Yes No
Air Operated
Yes Yes No
Tri-Clamp / Tri-Clover
Yes Yes Yes
Direct Readout Option
Yes No Yes
Tropicalization, other coatings
Yes Yes Yes
Signal Light
Yes Yes No
Alarm Silencing Relay
Yes Yes Yes
DIN Flanges and others
Yes Yes Yes
Tamper-Proof Setup
Yes Yes Yes
Special Flow Conditions
Yes Yes Yes
Note (1): For 400° F change micro-switch.
Note (2): Specify NEMA classification.
Note (3): Specify distance from face of mounting flange to default ID or C/L of pipe and pipe size.
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Flow Actuated Electrical Switches are unique in the field of flow controls. Our switches are not a standard shelf item, but are specifically produced to accommodate your application. The flow switches are maintenance free in lines from 1/16" to 12' or larger. 
