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DWYER 1640 floating contact null switch for high and low actuation

The unique electric switch design in the Series 1640 Floating Contact Null Switch for High and Low Actuation is another Dwyer Instruments, LLC innovation. The Dwyer® Model 1640 Differential Pressure Switch resembles the high precision large diaphragm Series 1630 switches. However, the Model 1640 is equipped with a single pole, double throw floating contact switch (not snap acting) so it functions as a null switch.
As the diaphragm moves in response to pressure changes, it moves the floating contact to cause switching action at two preset points with no switching action between these points. The “high” circuit will be closed when rising pressure differential reaches the preset level. The “low” circuit will be closed when falling pressure differential reaches the preset level.

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Made in USA. brand DWYER, model 1640

International delivery to United Arab Emirates, Kuwait, Qatar, Saudi Arabia, Saudi Arabia, Bahrain, Oman and other Middle Eastern countries.
Our warehouses are located in UAE.

Retail price from $780

Available

Available

Founded in 1931, DWYER manufactures equipment for measurement, conversion and control – pressure, temperature, level, flow.

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Only the best I&C brands

Our company is a UAE supplier of control and measuring instruments from well-known world brands

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Discounts for organisations

We sell high-tech equipment at best prices. We provide really advantageous conditions for partners

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Fast delivery across the Middle East

Supply to United Arab Emirates, Kuwait, Qatar, Saudi Arabia, Bahrain, Oman and other countries

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Professional advice on device selection

Our specialists are ready to advise you on any technical question. We can find an analogue of any device

Description of DWYER 1640

CAUTION: FOR USE ONLY WITH AIR OR COMPATIBLE GASES.

PRODUCT APPLICATIONS

  • Damper positioning
  • Duct air control

FEATURES

  • Floating “null” switch supports applications requiring two set point actions such as open and close damper control
  • Visible set point indicator simplifies operation and trouble shooting
  • Large diaphragm provides low range accuracy providing precise control

OPTIONS

  • -WP Weatherproof Housing

Technical specifications of DWYER 1640

  • Service: Air and non-combustible, compatible gases.
  • Wetted Materials: Consult factory.
  • Temperature Limits: -30 to 110°F (-34.4 to 43.3°C).
  • Pressure Limits: 10 psig (68.95 kPa) continuous, 25 psig (172.4 kPa) surge.
  • Switch Type: SPDT floating contact (not snap action).
  • Electrical Rating: Non-inductive: 2.5 A @ 110 VAC, 1.5 A @ 220 VAC, 1 A @ 24 VDC, 0.5 A @ 110 VAC; Inductive: 1 A @ 110 VAC, 0.5 A @ 220 VAC, 0.5 A @ 24 VDC. (De-rate 70-80% for very slow pressure changes.)
  • Electrical Connections: 3 screw type.
  • Process Connections: 1/8″ female NPT.
  • Mounting Orientation: Diaphragm in vertical position. Consult factory for other position orientations.
  • Set Point Adjustment: Screw type.
  • Weight: 4 lb 13 oz (2.18 kg).
  • Compliance: CE.

How to buy DWYER 1640

Model Description Price
1640-0 Floating contact null switch, range .01-0.2″ w.c., adj. null span, .01 min. set, .03 max. Set.
$780.00
1640-1 Floating contact null switch, range 0.2-1.0″ w.c., adj. null span, .02 min. set, .06 max. Set.
$780.00
1640-10 Floating contact null switch, range 3.0-12.0″ w.c., adj. null span, .04 min. set, .20 max. Set.
$780.00
1640-2 Floating contact null switch, range 1.0-4.0″ w.c., adj. null span, .03 min. set, .12 max. Set.
$780.00
1640-5 Floating contact null switch, range 2.0-6.0″ w.c., adj. null span, .03 min. set, .18 max. Set.
$780.00
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Model Chart DWYER 1640

EXAMPLE 1640 0 AT Series 1640-0-AT Floating Contact Null Switch for High and Low Actuation, range 0.01-0.2″ w.c., with aluminum tag.
SERIES 1640 Floating Contact Null Switch for High and Low Actuation
RANGE 0
1
2
5
10
.25KPA
1KPA
1.5KPA
3KPA
0.01 – 0.2″ w.c.
0.20-1.0″ w.c.
1.0-4.0″ w.c.
2.0-6.0″ w.c.
3.0-12.0″ w.c.
0.05-0.25 kPa
0.4-1.0 kPa
0.5-1.5 kPa
1.0-3.0 kPa
OPTIONS AT
LC
PRESET
ST
Aluminum Tag
Less Conduit
Preset
Stainless Steel Tag
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User Guide and Instruction manual for DWYER 1640

You can request the necessary certificates, documentation, instructions and user guide for DWYER 1640 using the special form.

You can buy DWYER 1640 in UAE at a price starting from 780 $ in «Texair FZCO» by leaving a request on the website, by phone +441225535040 or by email . DWYER 1640 price are subject to change depending on exchange rates. We deliver instruments by transport companies in United Arab Emirates, Kuwait, Qatar, Saudi Arabia, Saudi Arabia, Bahrain and other Middle Eastern countries.

See also: Pressure Switches