Diaphragm Operated Pressure Switches- Series SA1100
Visible setpoint, adjustable deadband, weather-proof, explosion-proof. Option hermetically sealed snap switch.
Extremely rugged construction assures excellent reliability in chemical, petroleum and industrial plants. New design also provides burst pressure protection to 3000 PSI (206 bar). The rolling diaphragm design maintains a constant effective area to minimize friction. This results in a minimum deadband as low as 5% of full scale. Since many applications require higher deadbands, the SA1100 includes a separate adjustment of this when necessary. A pump being used to control liquid level in a tank would be a typical situation where this feature would be important. Both setpoint and deadband adjustments are protected, yet clearly visible behind a clear polycarbonate window and are fully isolated from the electrical components for additional safety. A 7/16" open-end wrench is the only tool required to change settings. Terminal blocks are provided for switch wiring connections and both internal and external ground screws are included. Standard housing is weatherproof to NEMA standards 1 through 4X and 13; explosion-proof to NEMA 7, Class I, Groups B, C, & D; NEMA 9, Class II, Groups E, F, & G or Cenelec Eexd IIC T6 (T amb. = 75°C); is UL/CSA listed and Cenelec certified to IP56. Optional construction adds drain to meet IP54. Diaphragm elements are available in either Buna-N or Fluorocarbon for compatibility in many liquid or gas applications.
APPLICATIONS
Chemical, petroleum, food and drug processing industries. Used indoor, outdoor or in explosion-proof area. Machine tools, high vibration locations.
| Temperature Limits: | -30 to 180°F (-35 to 82°C) |
|---|---|
| Maximum Operating Pressure: | 1200 PSIG (82.6 bar) |
| Maximum Pressure Without Bursting: | 3000 PSIG (206 bar) |
| Weather-Proof Rating: | NEMA 1 to 4X and 13 |
| Explosion-Proof Ratings: | NEMA 7, Class 1, Groups B, C & D; NEMA 9, Class ll, Groups E, F & G |
| Process Connection: | 1/4" (K1) or 1/2" (K2) NPTF |
| Conduit Opening: | 3/4" female NPT |
| Switch Type: | 1 or 2 SPDT snap |
| Wiring Connections: | 3 screw terminals |
| Electrical Ratings: | 15 A @ 125/250/480 VAC, 1/8 HP @ 125 VAC, 1/4 HP @ 250VAC, 1/2A @ 125V DCres., 1/4A @ 250A res. |
| Setpoint and Deadband Adjustment: | 7/16" hex nuts |
| Housing Material: | Copper free, die cast aluminum |
| Finish: | Textured gray polyurethane |
| Connection Materials: | Aluminum, brass or 316 SS |
| Wetted Materials: | Buna-N fluorocarbon, aluminum, brass or 316 SS |
| Position: | Within 20° of vertical Weight: 3 1/2 lbs. (1.59 kg) |
| Aluminum pressure port* 1/4" NPTF process connection Buna-N diaphragm and O-ring |
316 SS pressure port 1/2" NPTF process connection Fluorocarbon diaphragm and O-ring |
| Model No. | Model No. |
|---|---|
| SA1111E-A4-K1 | SA1111E-S5-K2 |
| SA1112E-A4-K1 | SA1112E-S5-K2 |
| SA1113E-A4-K1 | SA1113E-S5-K2 |
| * Brass pressure port available for water service. Note: The fifth and sizth characters designate the range of adjustment. |
|
| Range No. |
Operating Range (psig/bar) |
Minimum Deadband (psig/bar) |
Maximum Deadband (psig/bar) |
|
|---|---|---|---|---|
| Low | High | |||
| 11 | 10-150/0.7-10 | 4.0/0.28 | 7.5/0.52 | 75/5.2 |
| 12 | 20-250/1.4-17.2 | 5.0/0.35 | 12.5/0.86 | 150/10 |
| 13 | 30-500/2.0-34 | 12/0.83 | 45/3.1 | 300/21 |
OPTIONS
- DPDT Contacts: Change tenth character to L. Example: SA1111 E-A4-L1.
- Approximate minimum deadband increases by 50%
- CENELEC Certified Construction: U, CSA and CENELEC approved. Add suffix CN.
- Example: SA1111 E-A4-K1-CN
- Housing with Drain: Allows condensate to be drained from inside enclosure. Add suffix DR.
- Example: SA1111 E-A4-K1-DR
- Switch Options: Replace E in model number. Example: SA1111 HS-A4-K1.
- HS - Hermetically sealed snap switch
- HG - Hermetically sealed snap switch - gold contacts
SUGGESTED SPECIFICATION
Pressure switches shall be (UL/CSA) (Cenelec) listed and be diaphragm operated with fully adjustable setpoint. Switch shall have visible setpoint indicator and adjustable dead band protected by clear polycarbonate window. Electrical terminals shall be isolated from setpoint adjustment. Housing shall be weatherproof and explosion-proof Cl I, Groups B, C, & D; Cl II, Groups E, F, & G, Cenelec Eexd IIC T6 (T amb. = 75°C). Switches shall be Mercoid Model SA11(__)E-(__)-(__)-(__).