Mercoid Series D Enclosures
General Purpose • Watertight • Explosion-Proof
A general purpose NEMA 1 enclosure is furnished as standard on all Series D pressure switches. Weatherproof and explosion-proof housings are optionally available and designated by adding a third character to the model number. DAW, for example, indicates a DA pressure switch with a weatherproof enclosure.
General Purpose
NEMA 1 Enclosure
- For indoor use and general purpose applications under normal atmospheric conditions.
- Protection against dust and light splashing.
- Heavy gauge plain steel case. Flanged case available.
- Transparent cover for visible on/off operation.
- Locking device prevents tampering.
- Pressure connection: 1/4” NPT. Electrical: 1/2” conduit or BX.
- Shipping wt. 4 lb (1.8 kg).
Model suffix: standard (no suffix)
Watertight & Dust-Tight
Type W — NEMA 3S, 4 & 4X
- For outdoor or indoor applications.
- Complies with hose test: watertight, dust-tight, drip-tight, weatherproof, splash-proof, sleet-proof, moisture-resistant.
- Flanged, heavy gauge steel case with transparent cover.
- External adjustments protected by cover.
- Bottom pressure connection: 1/4” NPT. Electrical: 1/2” conduit, removable hub.
- Shipping wt. 6 lb (2.7 kg).
Model suffix: add “W” and change 1 to 3. Example: DAW-33-153-7
Explosion-Proof
NEMA 7 & 9 — Series DAH
- Class I, Groups C & D; Class II, Groups E, F & G.
- Control mechanism is integral — cannot be replaced in the field.
- For surface, panel, or pipe mounting.
- Aluminum case with glass window for visible on/off operation.
- Bottom pressure connection: 1/2” male NPT & 1/4” female NPT.
- Available with breather and drain. Shipping wt. 8 lb (3.6 kg).
Model suffix: add “H” after DA or DS. Example: DAH-31-153-7
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