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Series DP Double Bellows Differential Pressure Switch
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
Starting at $1,701.45
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).
- Compliance:
- cULus.
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.
Model Chart
| 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 | ||||||
| E | Explosion-proof enclosure, NEMA-7, 9, Class I, Groups C & D, Class II, Groups E, F & G | CSA | |||||||
| CIRCUIT (SWITCHING) OPTIONS For 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 | ||||||
| _ _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 |
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. |
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