S p r i n k l e r
S y S t e m S
m o n i t o r i n g
WFDEXP
Explosion Proof
Waterflow Detector
Models Available
WFD20EXP
WFD25EXP
WFD30-2EXP
WFD35EXP
WFD40EXP
WFD50EXP
WFD60EXP
WFD80EXP
WFD40EXP
Replacement Parts
A77-01-02
A3008-00
WFDRK
Terminal Block
Retard Mechanism
Hardware Kit
Product Overview
New WFD30-2EXP models install
in 2″ hole sizes
Designed and approved to operate
in hazardous locations
NEMA 4 enclosure rating
Sensitivity setting spring mechanism
located outside of explosion environment
Sealed retard mechanism
Visual switch activation
Synchronized activation circuit
Field-replaceable terminal block
and retard mechanism
Only one conduit entrance required
for hook-up
System Sensor’s WFDEXP series is designed to handle extreme conditions. These
units are ideal for installation in hazardous locations classified as follows:
Class I, Groups B, C, D, Division 1 & 2
Class II, Groups E, F, G, Division 1 & 2
Class III, Division 1 & 2
Robust Construction.
The WFDEXP series consists of a rugged, NEMA 4
rated cast aluminum housing. Designed for both indoor and outdoor use, the
WFDEXP series operates across a wide temperature range, from 32ºF to 160ºF.
Inside, two sets of SPDT (Form C) synchronized switches are enclosed in a
rugged terminal block, to assure reliable performance.
Reliable Performance.
The WFDEXP series offers unique features that assure
greater operational reliability. By housing the spring mechanism separately
from the explosion environment, the sensitivity of the adjustment spring and
the detector is protected at all times. Adding to the WFDEXP’s reliability is its
sealed retard mechanism, which prevents contamination by dust and dirt when
the cover is removed.
Simplified Operation.
Like all System Sensor waterflow detectors, the WFDEXP
series is designed to ease installation. With its visible switch activation, the
WFDEXP’s retard timing can be verified, even during noisy conditions.
E200116
C169
44-00-E
3006195
SYSTEMSENSOR [ SYSTEMSENSOR ADVANCED IDEAS. ]
