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Mercoid Series DP Pressure Switch
Double Bellows Differential Pressure Switch
Visible Setpoints, Adjustable or Fixed Deadband, High Pressure ranges
 

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. Dimensional Information

SPECIFICATIONS
  • 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).
SWITCH DEADBAND - SINGLE STAGE psid (kg/cm2)
RANGE
NUMBER
RANGE
psid
MAX.
PRESS.
psi
APPROX. DEADBAND
WITH MERCURY SWITCH
APPROX. DEADBAND
WITH SNAP SWITCH
ADJ. MIN.
FIXED
ADJ. MIN.
FIXED
 2 FIXED
DPA-33
DPA-533
DPS-233
DPA-7033-153
DPS-7233-153
 DPS-7233-804
61
0-10(0-0.7)
50(3.5)
1(0.07)
.75(0.053)
.38(0.027)
1.5(0.11)
.5(0.035)
.6(0.042)
62
0-20(0-1.4)
100(7.0)
1.5(0.11)
1(0.07)
.5(0.035)
2.5(0.18)
1(0.07)
1(0.07)
64
0-30(0-2.1)
300(21)
3(0.21)
2(0.14)
.75(0.053)
6(0.42)
1.5(0.11)
1.5(0.11)
                 
 
 
 
DPA-43
DPA-543
DPS-243
DPA-7043-153
DPS-7243-153
 DPS-7243-804
62E
0-20(0-1.4)
100(7.0)
2(0.14)
1.5(0.11)
1(0.07)
3(0.21)
1.5(0.11)
1.5(0.11)
64E
0-30(0-2.1)
300(21)
3.5(0.25)
2.5(0.18)
1.5(0.11)
6(0.42)
2(0.14) 2.5(0.18)
65E
0-80(0-5.6)
600(42)
16(1.12)
4(0.28) 3(0.21) 20(1.4)
6(0.42)
8(0.56)
SWITCH DEADBAND - TWO STAGE psid (kg/cm2)
RANGE
NUMBER
RANGE
psid
MAX.
PRESS.
psi
DPA-400
WITH MERCURY SWITCHES
DPA-7400
WITH SNAP SWITCHES
MIN. SPREAD
BETWEEN SWITCHES
FIXED DEADBAND APPROX.
MINIMUM SPREAD
BETWEEN SWITCHES
FIXED DEADBAND
APPROX. 2 FIXED
DPA-433
DPA-433
DPA-7433
DPA-7433
61
0-10(0-0.7)
50(3.5)
2 (0.14)
.5 (0.035)
1.5 (0.11)
.6 (0.042)
62
0-20(0-1.4)
100(7.0)
4 (0.28)
1 (0.07)
3 (0.21)
1 (0.07)
64
0-30(0-2.1)
300(21)
8 (0.56)
1.5 (0.11)
6 (0.42)
1.5 (0.11)
             
 
 
 
DPA-443
DPA-443
DPA-7443
DPA-7443
62E
0-20(0-1.4)
100(7.0)
4 (0.28)
.75 (0.053)
3.5 (0.25)
1.5 (0.11)
64E
0-30(0-2.1)
300(21)
8 (0.56)
1 (0.07)
6.5 (0.46)
2.5 (0.18)
65E
0-80(0-5.6)
600(42)
16 (1.12)
6 (0.42)
20 (1.4)
12 (0.84)

 
Series DP Double Bellows Differential Pressure Switch - Snap Action Switch, SPDT, 15 A @ 120/240 VAC
Model Number Bellows Material Range - psid (bar) Maximum Pressure - psig (bar) Minimum Dead Band - psid (bar)
 DPA-7033-153-61 Brass 0-10 (0-0.7) 50 (3.5) 1.5 (.10)
 DPA-7033-153-62 Brass 0-20 (0-1.4) 100 (6.9) 2.5 (.17)
 DPA-7033-153-64 Brass 0-30 (0-2.1) 300 (20.7) 6.0 (.41)
 DPA-7043-153-62E 316SS 0-20 (0-1.4) 100 (6.9) 3.0 (.21)
 DPA-7043-153-64E 316SS 0-30 (0-2.1) 300 (20.7) 6.0 (.41)
 DPA-7043-153-65E 316SS 0-80 (0-5.5) 600 (41.4) 20 (1.4)
Series DP Double Bellows Differential Pressure Switch - Snap Action Switch, SPDT, 15 A @ 120/240 VAC
Model Number Bellows Material Range - psid (bar) Maximum Pressure - psig (bar) Fixed Dead Band - psid (bar)
 DPS-7233-153-61 Brass 0-10 (0-0.7) 50 (3.5) 0.5 (.03)
 DPS-7233-153-62 Brass 0-20 (0-1.4) 100 (6.9) 1.0 (.07)
 DPS-7233-153-64 Brass 0-30 (0-2.1) 300 (20.7) 1.5 (.10)
 DPS-7243-153-62E 316SS 0-20 (0-1.4) 100 (6.9) 1.5 (.10)
 DPS-7243-153-64E 316SS 0-30 (0-2.1) 300 (20.7) 2.0 (.14)
 DPS-7243-153-65E 316SS 0-80 (0-5.5) 600 (41.4) 6.0 (.41)
Series DP Double Bellows Differential Pressure Switch - Mercury Switch, SPDT, 4 A @ 120 V, 2 A @ 240 VAC/VDC
Model Number Bellows Material Range - psid (bar) Maximum Pressure - psig (bar) Minimum Dead Band - psid (bar)
 DPA-33-153-61 Brass 0-10 (0-0.7) 50 (3.5) 1.0 (.07)
 DPA-33-153-62 Brass 0-20 (0-1.4) 100 (6.9) 1.5 (.10 )
 DPA-33-153-64 Brass 0-30 (0-2.1) 300 (20.7) 3.0 (.21)
 DPA-43-153-62E 316SS 0-20 (0-1.4) 100 (6.9) 2.0 (.14)
 DPA-43-153-64E 316SS 0-30 (0-2.1) 300 (20.7) 3.5 (.24)
 DPA-43-153-65E 316SS 0-80 (0-5.5) 600 (41.4) 16 (1.1)
Related Links:
Model Chart
Electrical Ratings Chart
 
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