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| Related Item: Duotect Series H2 Switches |
Duotect Series H3 Explosion-proof Differential Pressure
Switches
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| Setpoints from 10" w.c. to 200 psid, Rated
1500 psig, Weatherproof |
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|
 Explosion-proof,
heavy duty, industrial unit has patented and unique new design
which provides sensitivity to differential pressures as low
as 10 inches of water (254 mm w.c.), yet handles total pressure
of 1500 psi (103 bar). Unit yields deadbands approximately
5% of range, with zero setpoint shift due to variation in
working pressures. Friction is minimized and repeatability
increased by allowing range spring to act directly on diaphragm
plate. Rolling diaphragm design maintains constant effective
area to further reduce friction. See H3 without cover Diaphragm is allowed to "seat",
allowing application of full rated pressure, up to 1500 psi
(103 bar), on either high or low pressure port, without damage.
Special over-travel feature prevents overtightening of range
adjust screw. Choose optional brass chamber for water and
water-based fluids or 316 stainless steel for harsher applications. See Dimensions
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| SPECIFICATIONS |
Wetted Materials: See pressure chamber and diaphragm
material in model chart.
Temperature Limit: 220°F (105°C).
Pressure Limit: 1500 psig (103 bar).
Enclosure Rating: See ratings chart.
Switch Type: SPDT or DPDT snap switch.
Electrical Rating: 5A @ 125/250 VAC, 30 VDC.
Electrical Connections: see model chart.
Conduit Connection: 3/4" female NPT.
Process Connection: 1/8" female NPT.
Mounting Orientation: Vertical.
Set Point Adjustment: Internal screw.
Weight: 4 lb, 2 oz (2 kg).
Deadband: Approximately 5% of range.
Agency Approvals: UL and CSA see ratings chart. CE. ATEX pending. |
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| Model Chart - Series H3 |
| Example |
H3 |
S |
2 |
S |
C |
MV |
H3S-2SC-MV Differential Pressure Control; 316SS pressure chamber and Viton® diaphragm, weatherproof and explosion-proof enclosure, SPDT snap action switch with gold contacts; fixed deadband; automatic reset; adjustable range 0.5-15 psid. |
| Construction |
H3 |
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Series designator, weatherproof and explosion-proof |
| Pressure Chamber & Diaphragm Material (Wetted) |
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A
S |
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Aluminum chamber with Nitrile diaphragm
316SS chamber with Viton® diaphragm |
Adjustable Operating Range
(Deadband approx. 5% of range.)
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1
2
3
4
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Adjustable range 10-180" w.c. (2.48-44.78 kPa)
Adjustable range 0.5-15 psid (0.3-1 bar)
Adjustable range 5-70 psid (.34-4.8 bar)
Adjustable range 10-200 psid (.7-13.8 bar)
Max. pressure for all ranges is 1500 psi (103 bar.) |
| Circuit (Switch) Options |
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S
D |
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SPDT snap action switch rated 5A @ 125/250VAC, 30 VDC
DPDT snap action switch rated 5A @ 125/250VAC, 30 VDC |
| Electrical Connection |
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L
C
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18 AWG x 18 inch lead wires
UL, CSA approved internal terminal block
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| Options |
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CSA
DRAIN
MV
VIT |
CSA approved construction
Housing with drain - allows condensate to be drained from inside enclosure (meets NEMA 3 instead of 4X)
Gold contacts on snap switch for dry circuits rated 1A @ 125VAC, 1A resistive or 0.5A inductive @ 30VDC
Viton® diaphragm option where not standard |
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| Popular SPDT Contacts Models |
Model
Number |
Pressure Chamber |
Diaphragm Material (Wetted) |
Adjustable Operating Range |
Circuit (Switch) Options |
| H3A-1SL |
Aluminum |
Nitrile |
10-180 in. w.c. (2.48-44.78 kPa) |
SPDT snap action switch rated 5A @ 125/250 VAC, 30 VDC |
| H3A-2SL |
Aluminum |
Nitrile |
0.5-15 psid (0.3-1 bar) |
SPDT snap action switch rated 5A @ 125/250 VAC, 30 VDC |
| H3A-3SL |
Aluminum |
Nitrile |
5-70 psid (.34-4.8 bar) |
SPDT snap action switch rated 5A @ 125/250 VAC, 30 VDC |
| H3A-4SL |
Aluminum |
Nitrile |
10-200 psid (.7-13.8 bar) |
SPDT snap action switch rated 5A @ 125/250 VAC, 30 VDC |
| H3B-1SL |
Brass |
Nitrile |
10-180 in. w.c. (2.48-44.78 kPa) |
SPDT snap action switch rated 5A @ 125/250 VAC, 30 VDC |
| H3B-2SL |
Brass |
Nitrile |
0.5-15 psid (0.3-1 bar) |
SPDT snap action switch rated 5A @ 125/250 VAC, 30 VDC |
| H3B-3SL |
Brass |
Nitrile |
5-70 psid (.34-4.8 bar) |
SPDT snap action switch rated 5A @ 125/250 VAC, 30 VDC |
| H3B-4SL |
Brass |
Nitrile |
10-200 psid (.7-13.8 bar) |
SPDT snap action switch rated 5A @ 125/250 VAC, 30 VDC |
| H3S-1SL |
316 SS |
Viton |
10-180 in. w.c. (2.48-44.78 kPa) |
SPDT snap action switch rated 5A @ 125/250 VAC, 30 VDC |
| H3S-2SL |
316 SS |
Viton |
0.5-15 psid (0.3-1 bar) |
SPDT snap action switch rated 5A @ 125/250 VAC, 30 VDC |
| H3S-3SL |
316 SS |
Viton |
5-70 psid (.34-4.8 bar) |
SPDT snap action switch rated 5A @ 125/250 VAC, 30 VDC |
| H3S-4SL |
316 SS |
Viton |
10-200 psid (.7-13.8 bar) |
SPDT snap action switch rated 5A @ 125/250 VAC, 30 VDC |
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| Popular DPDT Contacts Models |
Model
Number |
Pressure Chamber |
Diaphragm Material (Wetted) |
Adjustable Operating Range |
Circuit (Switch) Options |
| H3A-1DL |
Aluminum |
Nitrile |
10-180 in. w.c. (2.48-44.78 kPa) |
DPDT snap action switch rated 5A @ 125/250 VAC, 30 VDC |
| H3A-2DL |
Aluminum |
Nitrile |
0.5-15 psid (0.3-1 bar) |
DPDT snap action switch rated 5A @ 125/250 VAC, 30 VDC |
| H3A-3DL |
Aluminum |
Nitrile |
5-70 psid (.34-4.8 bar) |
DPDT snap action switch rated 5A @ 125/250 VAC, 30 VDC |
| H3A-4DL |
Aluminum |
Nitrile |
10-200 psid (.7-13.8 bar) |
DPDT snap action switch rated 5A @ 125/250 VAC, 30 VDC |
| H3S-1DL |
316 SS |
Viton |
10-180 in. w.c. (2.48-44.78 kPa) |
DPDT snap action switch rated 5A @ 125/250 VAC, 30 VDC |
| H3S-2DL |
316 SS |
Viton |
0.5-15 psid (0.3-1 bar) |
DPDT snap action switch rated 5A @ 125/250 VAC, 30 VDC |
| H3S-3DL |
316 SS |
Viton |
5-70 psid (.34-4.8 bar) |
DPDT snap action switch rated 5A @ 125/250 VAC, 30 VDC |
| H3S-4DL |
316 SS |
Viton |
10-200 psid (.7-13.8 bar) |
DPDT snap action switch rated 5A @ 125/250 VAC, 30 VDC |
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