Home » Pressure Switches » DWYER DP double bellows differential pressure switch

DWYER DP double bellows differential pressure switch

Two opposing bellows combine maximum sensitivity and vibration resistance at a moderate cost in the Series DP Differential Pressure Switches. Both set and reset points are easily adjustable through non-interactive, externally accessible controls. Visible setpoint indicators simplify changes. SPDT snap action switch, 316 stainless steel or brass bellows, flanged steel housing. Rated pressures to 600 psig.

			

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Made in USA. brand DWYER, model DP

International delivery to Europe, Asia and Africa.
Our warehouses are located in the UK, UAE and Senegal.

Retail price from $1701,45

Available

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

Only the best I&C brands

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

Discounts for organisations

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

Fast delivery across the Europe & Asia

We take care of all logistics and customs clearance of I&C solutions from Europe, USA, China and India

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 DP

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.

PRODUCT APPLICATIONS

Accurate switch triggers in high pressure applications

FEATURES

Bellows switch design provides sensitivity to pressure changes but resists vibration preventing out of range switching
External access to set and rest controls makes for easy adjustments
Visible set point indicators simplify changes

OPTIONS

Weatherproof Housing – to order add “W” suffix after DPA. Example: DPAW-7033-153-61.
Explosion-proof Housing – to order add “E” suffix after DPA. Example: DPAE-7033-153-61.

Technical specifications of DWYER DP

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).
Compliance: cULus.

How to buy DWYER DP

Model	Description	Price
DPA-33-153-61	Differential pressure switch, brass bellows, range 0-10 psid (0-0.7 bar), max. pressure 50 psig (3.5 bar), min. deadband 1.0 psid (.07 bar).	$1,701.45
DPA-33-153-62	Differential pressure switch, brass bellows, range 0-20 psid (0-1.4 bar), max. pressure 100 psig (6.9 bar), min. deadband 1.5 psid (.10 bar).	$1,701.45
DPA-33-153-64	Differential pressure switch, brass bellows, range 0-30 psid (0-2.1 bar), max. pressure 300 psig (20.7 bar), min. deadband 3.0 psid (.21 bar).	$1,701.45
DPA-43-153-62E	Differential pressure switch, 316SS bellows, range 0-20 psid (0-1.4 bar), max. pressure 100 psig (6.9 bar), min. deadband 2.0 psid (.14 bar).	$3,508.95
DPA-43-153-64E	Differential pressure switch, 316SS bellows, range 0-30 psid (0-2.1 bar), max. pressure 300 psig (20.7 bar), min. deadband 3.5 psid (.24 bar).	$3,508.95
DPA-7033-153-61	Differential pressure switch, brass bellows, range 0-10 psid (0-0.7 bar), max. pressure 50 psig (3.5 bar), min. deadband 1.5 psid (.10 bar).	$1,830.40
DPA-7033-153-62	Differential pressure switch, brass bellows, range 0-20 psid (0-1.4 bar), max. pressure 100 psig (6.9 bar), min. deadband 2.5 psid (.17 bar).	$1,830.40
DPA-7033-153-64	Differential pressure switch, brass bellows, range 0-30 psid (0-2.1 bar), max. pressure 300 psig (20.7 bar), min. deadband 6.0 psid (.41 bar).	$1,830.40
DPA-7043-153-62E	Differential pressure switch, 316SS bellows, range 0-20 psid (0-1.4 bar), max. pressure 100 psig (6.9 bar), min. deadband 3.0 psid (.21 bar).	$3,478.80
DPA-7043-153-64E	Differential pressure switch, 316SS bellows, range 0-30 psid (0-2.1 bar), max. pressure 300 psig (20.7 bar), min. deadband 6.0 psid (.41 bar)	$3,478.80

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Model Chart DWYER DP

EXAMPLE	DPA		_33	_153			61	DPA-33-153-61 Differential Pressure Control, brass bellows, adjustable deadband, automatic reset, SPDT mercury switch, adjustable range 0-10 psid (0-0.7), operating range 30″ Hg vac – 50 psig (75 cm Hg vac – 3.5)
CONSTRUCTION	DP_							General purpose enclosure, NEMA -1 (standard)	CSA
RESET OPTIONS	A							Automatic reset, adjustable deadband, double adjustment
	R					U		Manual reset, single adjustment, operates on decrease automatically	CSA
	R					L		Manual reset, single adjustment, operates on increase automatically	CSA
	S							Automatic reset, fixed deadband, single adjustment
HOUSING OPTIONS		W						Weatherproof enclosure, NEMA-3R, 4, 4X	CSA
HOUSING OPTIONS		E						Explosion-proof enclosure, NEMA-7, 9, Class I, Groups C & D, Class II, Groups E, F & G	CSA
CIRCUIT (SWITCHING) OPTIONSFor electrical code see chart below.				2				SPST mercury switch, elect. code A, opens on differential pressure increase	CSA
				3				SPST mercury switch, elect. code A, closes on differential pressure increase	CSA
				153				SPDT mercury switch, elect. code B	CSA
				156				SPDT, 2 each SPST mercury switches, 1 each opens on differential pressure increase, 1 each closes on differential pressure increase, elect. code A	CSA
				804				DPDT, 2 each SPDT mercury switches, elect. code B	CSA
				( )				Other circuits available, consult factory
	S		2_ _	2				SPST magnetic mercury switch, elect. code I, opens on differential pressure increase, fixed deadband	CSA
	S		2_ _	3				SPST magnetic mercury switch, elect. code I, closes on differential pressure increase, fixed deadband	CSA
			4_ _	4132				2 stage, 2 each SPST magnetic mercury switches, 1 each closes on differential pressure increase, 1 each closes on decrease, both open mid range, elect. rating per note †† below	CSA
			5_ _	2				SPST magnetic mercury switch, elect. code H, opens on differential pressure increase, narrow adjustable deadband	CSA
			5_ _	3				SPST magnetic mercury switch, elect. code H, closes on differential pressure increase, narrow adjustable deadband	CSA
			70_ _	153				SPDT snap acting switch, elect. code D, adjustable deadband
			70_ _	804				DPDT, 2 each SPDT snap acting switches, consult factory
	S		72_ _	153				SPDT snap acting switch, fixed deadband, elect. code E per note ‡‡ below
	S		72_ _	804				DPDT, 2 SPDT snap acting switches, fixed deadband, elect. code G per note ‡‡ below
			74_ _					2 stage, 2 each SPDT snap acting switches, elect. code G per note ‡‡ below
OPTION					B			Delrin® bushed movement
BELLOWS MATERIALS			_ _33					Brass bellows, ranges 61, 62, 64 only	CSA
BELLOWS MATERIALS			_ _43					Type 316 stainless steel bellows, ranges 62E, 64E, 65E only	CSA
ADJUSTABLE DIFFERENTIAL PRESSURE RANGES OPERATING PRESSURE RANGES				61				Adjustable range 0-10 psid, operating range 30″ Hg vac – 50 psig, (75 cm Hg vac – 3.5)	CSA
				62				Adjustable range 0-20 psid, operating range 30″ Hg vac – 100 psig, (75 cm Hg vac – 7.0)	CSA
				64				Adjustable range 0-30 psid, operating range 30″ Hg vac – 300 psig, (75 cm Hg vac – 21)	CSA
				62E				Adjustable range 0-20 psid, operating range 30″ Hg vac – 100 psig, (75 cm Hg vac – 7.0)	CSA
				64E				Adjustable range 0-30 psid, operating range 30″ Hg vac – 300 psig, (75 cm Hg vac – 21)	CSA
				65E				Adjustable range 0-80 psid, operating range 30″ Hg vac – 600 psig, (75 cm Hg vac – 42)	CSA

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ELECTRICAL RATINGS

CODE	SUFFIX	AC CAPACITY			DC CAPACITY HP		AC	DC
CODE	SUFFIX	120V	240V	440V	120V	240V	AC	DC
A	-2, -3, -156	10A	5A	3A	10A	5A	3/4	1/3
B	-153, -804	4A	2A	**	4A	2A	1/8	NA
D	-153	15A	15A	15A	0.5A	0.25A	1/8	NA
E	-153	15A	15A	NA	‡	‡	†	NA
G	-804	5A	5A	NA	•	•	NA	NA
H	-2, -3	5A	2A	NA	2.5A	1A	1/8	1/10
I	*-2, -3	0.5A	0.25A	NA	0.25A	0.15A	NA	NA

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User Guide and Instruction manual for DWYER DP

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

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You can buy DWYER DP in UK or Europe at a price starting from 1701,45 $ in «DOLCHETRADE» by leaving a request on the website, by phone +441225535040 or by email dolce@dolcetrade.com. DWYER DP price are subject to change depending on exchange rates. We deliver instruments by transport companies in the United Kingdom and Europe.