DP系列 雙膜盒差壓開關-德威爾Dwyer
Two opposing bellows in the Model DP differential pressure switch result in maximum sensitivity, quick response to changes and good vibration resistance. Choice of brass or 316 stainless steel assures broad media compatibility. Setpoint adjustment is easy thanks to external knobs and large, clear scale reading directly in psid.
A wide variety of switches and circuit styles enables exactly the specific type of control function needed for any system. Mercury switches are a good choice for humid areas while snap switches are better able to resist vibration. Various operations possible include single adjustment - fixed deadband, double adjustment - adjustable deadband, manual reset (increasing or decreasing pressure) and two stage with each SPST or SPDT switch independently adjustable. Standard enclosure is NEMA-1 style. Optional weatherproof construction is for outdoor use and explosion-proof enclosure meets requirements for Class I, Groups C & D; Class II, Groups E, F & G.
Wetted Materials: Brass on ranges 61, 62, 63 or 316SS on ranges 62E, 64E 65E.
Temperature Limits: -10 to 180°F (-23 to 82°C).
Pressure Limit: Maximum pressure of the operating range.
Enclosure Rating: General purpose, weatherproof or explosion-proof.
Switch Type: Mercury or snap switch, see Ordering Page.
Electrical Rating: See Ordering Page.
Electrical Connection: Screw terminal.
Conduit Connection: General purpose: 1/2" hole for conduit hub. Weatherproof: 1/2" conduit hub. Explosion-proof: 3/4" NPT female.
Process Connection: General purpose and weatherproof: 1/8" NPT female. Explosion-proof: 1/4" NPT male.
Mounting Orientation: Vertical.
Set Point Adjustment: Thumbscrew.
Weight: General purpose: 5 lb (2.3 kg). Weatherproof: 7 lb (3 kg). Explosion-proof: 25 lb (11 kg).
Agency Approvals: CE, cULus.
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