Series DP Double Bellows Differential Pressure Switch

Double Bellows Differential Pressure Switch
Visible Setpoints, Adjustable or Fixed Deadband . . . High Pressure Ranges

Visible Setpoints, Adjustable or Fixed Deadband . . . High Pressure Ranges

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.

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
More Information
Model Chart
EXAMPLEDPA  _33_153  61DPA-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) 
CONSTRUCTIONDP_      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 automaticallyCSA
R    L Manual reset, single adjustment, operates on increase automaticallyCSA
S      Automatic reset, fixed deadband, single adjustment 
HOUSING
OPTIONS
 W     Weatherproof enclosure, NEMA-3R, 4, 4XCSA
 E     Explosion-proof enclosure, NEMA-7, 9, Class I, Groups C & D, Class II, Groups E, F & GCSA
CIRCUIT
(SWITCHING)
OPTIONS

For electrical code see chart below.
   2   SPST mercury switch, elect. code A, opens on differential pressure increaseCSA
   3   SPST mercury switch, elect. code A, closes on differential pressure increaseCSA
   153   SPDT mercury switch, elect. code BCSA
   156   SPDT, 2 each SPST mercury switches, 1 each opens on differential pressure increase, 1 each closes on differential pressure increase, elect. code ACSA
   804   DPDT, 2 each SPDT mercury switches, elect. code BCSA
   ( )   Other circuits available, consult factory 
S 2_ _2   SPST magnetic mercury switch, elect. code I, opens on differential pressure increase, fixed deadbandCSA
S 2_ _3   SPST magnetic mercury switch, elect. code I, closes on differential pressure increase, fixed deadbandCSA
  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 †† belowCSA
  5_ _2   SPST magnetic mercury switch, elect. code H, opens on differential pressure increase, narrow adjustable deadbandCSA
  5_ _3   SPST magnetic mercury switch, elect. code H, closes on differential pressure increase, narrow adjustable deadbandCSA
  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 onlyCSA
  _ _43    Type 316 stainless steel bellows, ranges 62E, 64E, 65E onlyCSA
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

ELECTRICAL RATINGS

CODE
SUFFIX
AC CAPACITY
DC CAPACITY HP
AC
DC
120V
240V
440V
120V
240V
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
*Also rated 1.0A at 24 VAC.
1/4 HP at 120 VAC, 1/2 HP at 240 VAC.
DC controls up to 10A. Consult factory.
5A 30 VDC resistive.
**-153 Circuit available 1A, 440V on special order.
††DP-433 & DP-443 rated 0.3A at 120 VAC, 0.15A at 240 VAC, 0.9A at 24 VAC, 0.15A at 120 VDC, 0.07A at 240 VDC. Manual reset no available.
‡‡Manual reset not available.
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.
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.
  • 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