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Clark Solutions
Model 24, Differential Pressure Switch
Brass or Polysulfone®, Adjustable Ranges 1 to 45 PSID
DESCRIPTION
The 24 Series differential pressure and vacuum switch offers a unique blend of compact size, excellent performance, environmental protection and attractive price. Available with brass or polysulfone® pressure connections, the Model 24 Pressure Switch will stand up in your most corrosive applications. The precision snap-acting switch and sensitive diaphragms combine to provide a narrow deadband and repeatability of approximately ±1% of range span. The convenient, externally accessible adjustment screw is multi-turn to provide easy set point adjustability. The force-balanced design gives the Model 24 excellent vibration resistance.
The Model 24 Vacuum Switch was designed to be a compact, cost-effective differential pressure switch for applications such as proof-of-flow, filter monitoring, etc. It depends on two opposing diaphragms to sense pressure on the "High" and "Low" pressure outputs of a system. The resulting pressure differential is transmitted through a linkage to a snap-action electrical switch, providing an output when a pre-set difference is exceeded. This set point can be easily modified while under pressure via an external adjusting screw. This adjustment "pre-loads" the actuation mechanism, which results in excellent vibration-resistance. Straight pressure and vacuum versions, with a single diaphragm, are also available.
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UL Listed, cUL Certified
Pressure:UL 508;CSA C22.2 No.14-M95 --File #E42272
CENELEC/TÜV certified to PED (97/23/EC), Category IV, Module H1, Certificate #USA 02/04/38/001 thru USA 02/07/38/033UEC
Compliant to LVD (73/23/EC &93/68/EEC) |
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SPECIFICATIONS
GENERAL
Storage Temperature: -20° to 180°F (-29° to 82°C)
Ambient Temperature: 30° to 160°F (-1° to 71°C).
Set point typically shifts less than ±0.6% of range for a
50°F (28°C) ambient temperature change; consult
factory for special ratings
Max Media Temperature: 200°F (93°C) at 100 psi working
pressure; 160°F (71°C) at 100 psi working pressure for
models 030, 031
Shock: Set point repeats after 15G, 10 millisecond duration.
(MIL-STD-810)
Vibration: Set point repeats after 2.5 G, 5-500 Hz.
(MIL-STD-810)
Enclosure Classification: Complies with enclosure NEMA 4
requirements with optional water tight conduit
connector. Reinforced polyester body, stainless steel
cover with neoprene gasket. All external hardware
Teflon® coated on models 030 and 031
Set Point Repeatability: Typically ± 1% of span. Application
dependent.
Switch Output: SPDT precision snap-acting design with
mechanical contact life of 10 million cycles. Actual life
depends on electrical load and cycle frequency
Electrical Rating: Rated to 5 A resistive and 5 A inductive
(75%PF) at 125 VAC and 250 VAC, 1/4 HP; 5 A resistive
and 3 A inductive at 30 VDC and 0.5 A resistive and 0.25
inductive at 125 VDC. Gold clad silver contacts for
minimum loads of 5 mA at 6 VDC,2 mA at 12 VDC and
1 mA at 24 VDC
Weight: 6.5 oz.
Electrical Connection: 7/8"hole for optional 1/2"NPT conduit
connector. Terminal block with screw terminals. Max wire
size 16 AWG
Pressure Connection: 1/4"NPT (female)
Brass; 1/4"NPS (female) FDA approved polysulfone®,
non-tapered to minimize connection stress with 1/4"
NPT (male) fittings, Max. torque 2 ft. lbs.
Mounting & Installation: Surface mount with two screws
through clearance holes, or mount by pressure
connections
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Flaretek® is a registered trademark of Fluoroware, Inc.
Polysulfone® is a registered trademark of Amoco. |
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| Range/Material Code |
Adjustable Range |
Typical Deadband |
*Max Working Pressure |
**Proof Pressure |
| psid |
bar |
psid |
bar |
psi |
bar |
psi |
bar |
| Polyurethane (polyether) diaphragm, ethylene propylene O-Ring, 1/4" NPT (female) brass pressure connection |
| 013 |
1 to 10 |
70 mbar to 0.7 |
0.75 |
0.05 |
150 |
10 |
150 |
10 |
| 014 |
4 to 45 |
0.3 to 3.0 |
1.0 |
0.07 |
150 |
10 |
150 |
10 |
| Polyurethane (polyether) diaphragm, ethylene propylene O-Ring, 1/4" NPS (female) (mechanical) polysulfone® pressure connection |
| 011 |
1 to 10 |
70 mbar to 0.7 |
0.75 |
0.05 |
150 |
10 |
150 |
10 |
| 012 |
4 to 45 |
0.3 to 3.0 |
1.0 |
0.07 |
150 |
10 |
150 |
10 |
| * Working Pressure: The pressure range within which two opposing sensors can be safely operated and still maintain set point adjustability provided the difference in pressure between them does not exceed the designated adjustable range. |
| **Proof Pressure: The maximum pressure to which a pressure sensor may be occasionally subjected, which causes no permanent damage. The unit may require calibration (e.g. start-up testing) |
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| Model |
Dimension A |
Pressure Connection |
| 011, 012 |
2.75 |
1/4” NPS (F) Polysulfone |
| 013, 014 |
3.13 |
1/4” NPT (F) Brass |
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ORDERING INFORMATION
ORDER NUMBER AB
EXAMPLE: 24030 |
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FOR YOUR CONVENIENCE, THESE ITEMS ARE AVAILABLE ONLINE
OR PLEASE CALL 1-800-253-2497 TO ORDER |
| A=Model |
B=Range/Material Code |
| 24 |
013=013 |
| 014= 014 |
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| PLEASE CALL 1-800-253-2497 TO ORDER THESE ITEMS |
| A=Model |
B=Range/Material Code |
| 24 |
013=013 |
| 014= 014 |
| 011=011 |
| 012=012 |
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| Options |
| - = None |
| M020 = Red status light, 115VAC only. Specify whether light turns on or off with increasing or decreasing pressure |
| M201= Factory set switch; specify increasing or decreasing and set point |
| M540 = Viton¨ construction (deadbands & low end of range may increase slightly).Wetted parts include Viton¨ diaphragm and/or O-Ring plus standard connection material. |
| M900= Water tight conduit fitting; converts 7/8" hole to 1/2" NPT fitting; must specify for compliance to NEMA 4 |
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