As an easy guide for you we have created this simple cross reference guide to help you find the part you need. If you have one of the part numbers listed below, simply match it to our part number.
Presair designs and manufactures adjustable pressure and vacuum switches. Presair switches are UL and CUL Recognized. All switches are made in the United States and our direct customer service would be happy to help you find the right switch for your application.
These compact pressure and vacuum switches are produced to exacting standards to meet the needs of original equipment manufacturers and instrument makers for a low cost, stable, repeatable switch. Plastic mechanisms and housings are acetal to minimize moisture absorption and maintain dimensional stability. Plastic welding is accomplished using advanced microprocessor controlled ultrasonic welding equipment. All switches are 100% tested at high and low settings and at the proof pressure. Units are delivered with the setpoint at the low end of the adjustable range. The pressure switches and vacuum switches are field adjustable using the hex head set screw at the center of the pressure switch.
CUSTOM PRESSURE & VACUUM SWITCHES
Custom pressure and vacuum switches are available; please contact us for price and delivery. Custom options include factory setting at specified setpoint and DPDT switches can be configured for different pressure settings.
Click an option below to view more product details or purchase in our online shop.
Can’t find your part number listed? Give our direct support a call with your switch or application requirements and one of our customer service representatives will assist you!
**Tip: Search this list for your part number using the Find function of your browser – Google Chrome’s shortcut is ctrl-f.
Pressure and Vacuum Switches
Compact, Rugged, Adjustable
Find your part number listed below for the direct replacement option:
| Your Part Number | Our Part Number | Item Description | Buy Now |
|---|---|---|---|
| 6731 Series & 6732 Series | Adjustable Pressure Switches | Adjustable low pressure switches
Range: 1.5 inches of water to 16 psig Switch Rating: 21A@250VAC |
Contact Us |
| 6741 Series & 6742 Series | Adjustable Pressure Switches | Adjustable medium pressure switches
Range: 1.5 Psi to 125 Psi Switch Rating: 21A@250VAC |
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| 3000 Series | Adjustable Pressure Switches | Adjustable pressure switches
Range: 2 inches of water to 100 psi Switch Rating: 21A@250VAC |
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| 3900 Series | Adjustable Pressure Switches | Adjustable pressure switches
Range: 6 inches of water to 5 psi Switch Rating: 21A@250VAC |
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| 4000 Series | Adjustable Pressure Switches | Adjustable pressure switches
Range: 6 inches of water to 5 psi Switch Rating: 21A@250VAC |
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| V4000 Series | Adjustable Vacuum Switches | Adjustable vacuum switches
Range: 2 inches of water to 300 inches of water. Switch Rating: 21A@250VAC |
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| PSW21A | PM10103E | Pressure Switch with SPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 3-7 inches of water rising Switch Rating: 3A@250VAC (resistive) |
Contact Us |
| PSW21B | PM10306A | Pressure Switch with SPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 5-35 inches of water rising Switch Rating: 5A@250VAC (resistive) |
Contact Us |
| PSW21C | PM11120E | Pressure Switch with SPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 1-6 Psig Rising Switch Rating: 21A@250VAC (resistive) |
$44.95 |
| PSW21D | PM12540E | Pressure Switch with SPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 4-11 Psig Rising Switch Rating: 25A@250VAC (resistive) |
Contact Us |
| PSW21E | PM12550E | Pressure Switch with SPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 9-18 Psig Rising Switch Rating: 25A@250VAC (resistive) |
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| PSW21F | PM12560E | Pressure Switch with SPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 15-28 Psig Rising Switch Rating: 25A@250VAC (resistive) |
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| PSW21G | PM12570E | Pressure Switch with SPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 25-40 Psig Rising Switch Rating: 25A@250VAC (resistive) |
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| PSW21H | PM12580E | Pressure Switch with SPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 35-65 Psig Rising Switch Rating: 25A@250VAC (resistive) |
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| PSW21J | PM12590E | Pressure Switch with SPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 50-100 Psig Rising Switch Rating: 25A@250VAC (resistive) |
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| PSW21K | PM12595E | Pressure Switch with SPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 75-120 Psig Rising Switch Rating: 25A@250VAC (resistive) |
Contact Us |
| PSW21L | VM10103E | Vacuum Switch with SPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 5-7 inches of water rising Switch Rating: 3A@250VAC (resistive) |
Contact Us |
| PSW21M | VM10306E | Vacuum Switch with SPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 6-16 inches of water rising Switch Rating: 5A@250VAC (resistive) |
Contact Us |
| PSW21N | VM10510E | Vacuum Switch with SPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 13-25 inches of water rising Switch Rating: 10A@250VAC (resistive) |
Contact Us |
| PSW21P | VM11115E | Vacuum Switch with SPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 20-40 inches of water rising Switch Rating: 21A@250VAC (resistive) |
$44.95 |
| PSW21Q | VM11120E | Vacuum Switch with SPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 35-80 inches of water rising Switch Rating: 21A@250VAC (resistive) |
$44.95 |
| PSW21R | VM11130E | Vacuum Switch with SPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 75-150 inches of water rising Switch Rating: 21A@250VAC (resistive) |
$44.95 |
| PSW21T | VM11140E | Vacuum Switch with SPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 145-300 inches of water rising Switch Rating: 21A@250VAC (resistive) |
$44.95 |
| PSW21BD | PM21306E | Pressure Switch with DPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 5-35 inches of water rising Switch Rating: 5A@250VAC (resistive) |
Contact Us |
| PSW21CD | PM21120E | Pressure Switch with DPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 1-6 Psig Rising Switch Rating: 21A@250VAC (resistive) |
$49.95 |
| PSW21DD | PM22540E | Pressure Switch with DPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 4-11 Psig Rising Switch Rating: 25A@250VAC (resistive) |
Contact Us |
| PSW21ED | PM22550E | Pressure Switch with DPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 9-18 Psig Rising Switch Rating: 25A@250VAC (resistive) |
Contact Us |
| PSW21FD | PM22560E | Pressure Switch with DPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 15-28 Psig Rising Switch Rating: 25A@250VAC (resistive) |
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| PSW21GD | PM22570E | Pressure Switch with DPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 25-40 Psig Rising Switch Rating: 25A@250VAC (resistive) |
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| PSW21HD | PM22580E | Pressure Switch with DPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 35-65 Psig Rising Switch Rating: 25A@250VAC (resistive) |
Contact Us |
| PSW21JD | PM22590E | Pressure Switch with DPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 50-100 Psig Rising Switch Rating: 25A@250VAC (resistive) |
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| PSW21KD | PM22595E | Pressure Switch with DPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 75-120 Psig Rising Switch Rating: 25A@250VAC (resistive) |
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| PSW21MD | VM21306E | Vacuum Switch with DPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 6-16 inches of water rising Switch Rating: 5A@250VAC (resistive) |
Contact Us |
| PSW21ND | VM20510E | Vacuum Switch with DPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 13-25 inches of water rising Switch Rating: 10A@250VAC (resistive) |
Contact Us |
| PSW21PD | VM21115E | Vacuum Switch with DPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 20-40 inches of water rising Switch Rating: 21A@250VAC (resistive) |
$49.95 |
| PSW21QD | VM21120E | Vacuum Switch with DPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 35-80 inches of water rising Switch Rating: 21A@250VAC (resistive) |
$49.95 |
| PSW21RD | VM21130E | Vacuum Switch with DPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 75-150 inches of water rising Switch Rating: 21A@250VAC (resistive) |
$49.95 |
| PSW21TD | VM21140E | Vacuum Switch with DPDT Switch, 1/8 MNPT Fitting and 9/16 Threaded Mounting Nut
Range: 145-300 inches of water rising Switch Rating: 21A@250VAC (resistive) |
$49.95 |
| PSW22A | PT10103A | Pressure Switch with SPDT Switch, Center Spout Fitting and 9/16 Threaded Mounting Nut
Range: 3-7 inches of water rising Switch Rating: 3A@250VAC (resistive) |
Contact Us |
| PSW22B | PT10306A | Pressure Switch with SPDT Switch, Center Spout Fitting and 9/16 Threaded Mounting Nut
Range: 5-35 inches of water rising Switch Rating: 5A@250VAC (resistive) |
Contact Us |
| PSW22C | PT11120A | Pressure Switch with SPDT Switch, Center Spout Fitting and 9/16 Threaded Mounting Nut
Range: 1-6 Psig Rising Switch Rating: 21A@250VAC (resistive) |
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| PSW22D | PT12540A | Pressure Switch with SPDT Switch, Center Spout Fitting and 9/16 Threaded Mounting Nut
Range: 4-11 Psig Rising Switch Rating: 25A@250VAC (resistive) |
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| PSW22E | PT12550A | Pressure Switch with SPDT Switch, Center Spout Fitting and 9/16 Threaded Mounting Nut
Range: 9-18 Psig Rising Switch Rating: 25A@250VAC (resistive) |
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| PSW22F | PT12560A | Pressure Switch with SPDT Switch, Center Spout Fitting and 9/16 Threaded Mounting Nut
Range: 15-28 Psig Rising Switch Rating: 25A@250VAC (resistive) |
Contact Us |
| PSW22BD | PT21306A | Pressure Switch with DPDT Switch, Center Spout Fitting and 9/16 Threaded Mounting Nut
Range: 5-35 inches of water rising Switch Rating: 5A@250VAC (resistive) |
Contact Us |
| PSW22CD | PT21120A | Pressure Switch with DPDT Switch, Center Spout Fitting and 9/16 Threaded Mounting Nut
Range: 1-6 Psig Rising Switch Rating: 21A@250VAC (resistive) |
Contact Us |
| PSW22DD | PT22540A | Pressure Switch with DPDT Switch, Center Spout Fitting and 9/16 Threaded Mounting Nut
Range: 4-11 Psig Rising Switch Rating: 25A@250VAC (resistive) |
Contact Us |
| PSW22ED | PT22550A | Pressure Switch with DPDT Switch, Center Spout Fitting and 9/16 Threaded Mounting Nut
Range: 9-18 Psig Rising Switch Rating: 25A@250VAC (resistive) |
Contact Us |
| PSW22FD | PT22560A | Pressure Switch with DPDT Switch, Center Spout Fitting and 9/16 Threaded Mounting Nut
Range: 15-28 Psig Rising Switch Rating: 25A@250VAC (resistive) |
Contact Us |
