Active Member
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[China]
Contact name:
Winsun Automation Instrumentation Co,.Ltd |
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| Performance Parameters | |||||
Model | Adjustment Range PSI Bar | Avg. Differential |
Model | Adjustment Range PSI Bar | Avg. Differential |
1 1.5-30 0.10-2.0
1A 14.5-200 1.0-14
Less than 10% of Actuation Point
3 300-2500 20-170
4 3000-6000 207-414
Less than 10% of Actuation Point
2 125-600 8-40 5 500-3500 35-240
ELECTRICAL:
100VA/42VDC
Gold contacts may be required for less than 12 VDC and 20 milliamp WETTED MATERIAL:
Diaphragm: Buna-N (standard) (optional EPDM, KAPTON®, VITON® Low Temperature Nitrile)
Housing: Zinc-Nickel Plated Steel (optional Steel - Electroless Nickel Plated, 316 Stainless Steel)
PROTECTION:
Exposed Terminals - IP00
Flying Leads & Deutsch Integral - IP69
REPEATABILITY:
± 3% of full set point range at 21°C Ambient Temperature
SWITCH TYPE:
Creep Action
MECHANICAL LIFE:
1,000,000 cycles
TEMPERATURE RANGE:
BUNA-N: -26℃~110℃ EPDM: -23℃~121℃ KAPTON®: -40℃~110℃ VITON®: -18℃~150℃
(® Registered Trademark of DuPont)
Low Temp Nitrile: -40℃~110℃ MAXIMUM OVERPRESSURE: 9000 PSI (620 Bar)
0.07 kg
| WEP1 | -*2 | -*R | -4M | -A | -FL | -*1 |
| Model | Set Point | Direction | Port Size | Circuit | Terminal | Options |
WEP1- Field Adjustable
WEP6- Factory Set | See Above Adjustment Ranges
*Model WEP6 Specify Set Point Required | R-PSI Rising F-PSI Falling BR-Bar Rising BF-Bar Falling
*Omit for Model WEP1 | 2M-1/8 NPT 4M-1/4 NPT 2G-1/8 BSPP 4G-1/4 BSPP (undercut for an o-ring seal) 4GS-1/4 BSPP (no undercut) 4S-7/16×20 SAE MALE 6S-9/16×18 SAE MALE M10-M10×1* M12-M12×1.5* | A-SPST/NO B-SPST/NC | SP-1/4"x1/32" Spade TS-6-32 Terminal Screws FL-18" Flying Leads FLL-Advise additional length of leads if required FLWTF-Weatherpack Tower Female FLWTM-Weatherpack Tower Male FLWSF-Weatherpack Shroud Female FLWSM-Weatherpack Shroud Male DI-Deutsch Integral | *-Omit If Standard 1-VITON® Diaphragm 2-EPDM Diaphragm 3-KAPTON® Diaphragm * * Ranges 1A & 2 Only 15 - Low Temp Nitrile Dia 4-316 SS Housing 4A-Steel-Electroless Nickel Plated 5- Spiral Restrictor 6- Oxygen Cleaned 7-Gold Contacts |
*Consult Factory for Specials |
| Appendix 1: Definitions and Terms | |
| DEFINITIONS AND TERMINOLOGY | Standard Electrical Circuit |
ACCURACY, (REPEATABILITY) - Accuracy is the maximum allowable set point deviation of a single
pressure or temperature
Wire Color
DIN 43650
Number
C
Circuit
switch under one given set of environmental and operational conditions.
ACTUATION AND DEACTUATION POINT - The actuation point (sometimes called set point) is the exact point at which the electrical circuit controlled by the switching element is opened (or closed) on increasing pressure or temperature. The deactuation point is the opposite at which the electrical circuit is closed (or opened) on decreasing pressure or temperature.
DEAD BAND - The dead band sometimes referred to as “differential” or “hysteresis” is the change in pressure between actuation and deactuation set points.
PRESSURE SWITCH - An instrument that upon the increase or decrease of a pressure or vacuum, opens or closes one or more electrical switching elements at a predetermined actuation point (setting).
PRESSURE SENSING ELEMENT - That portion of pressure switch that is in contact with and moves as a result of a change in pressure of the medium. The most common type of pressure sensing elements are diaphragms, accordion bellows, bourdon tubes, and pistons.
SINGLE POLE DOUBLE THROW (SPDT) SWITCHING ELEMENT -
A SPDT switching element has one normally open, one normally closed and one common terminal. Three terminals mean that the switch can be wired with the circuit either normally open (N/O) or normally closed (N/C).
NORMALLY CLOSED SWITCHING ELEMENT (NC) - Is one in which
the terminals are wired so that current can flow through the switching element until pressure is applied to open the electrical circuit.
NORMALLY OPEN SWITCHING ELEMENT (NO) - Is one in which
the terminals are wired so that no current can flow through the switching element until the pressure is applied to close the electrical circuit.
PRESSURE, PROOF - Proof Pressure is the maximum pressure which can be applied to any switch without causing permanent degradation.
Circuit Definitions
Single Pole - Single Throw Normally Open
Single Pole - Single Throw Normally Closed
Single Pole - Double Throw
Black 1 Common
Green 2 N. Closed
Red 3 N. Open
Wotian Pressure Switches are sealed, vibration resistant and ruggedly built to provide a reliable protection for automatic control of equipment and processes. They are designed for direct or remote mounting and offer a quality product at a competitive price.
Setting - The set point of each switch is preset at the factory as follows:
The switches can be ordered for operation with either rising or falling temperature, vacuum or pressure. Reset of the microswitch is automatic and depends upon the dead band or differential of the particular model.
Switch Protection - Standard switches offer excellent protection and long life in most applications. They are also sealed for weatherproof protection. The corrosion-resistant materials in the wetted areas and the standard nitrile diaphragm are suitable for most media. Where required the switches are available with VITON®, KAPTON®, EPDM or Low Temperature Nitrile diaphragms and, in some cases, optional steel, brass or stainless steel housings and wetted areas.
Mechanism - Where the pressure switch is subject to higher pressure, either dynamic or static, of over 700 psi, the diaphragm operating mechanism includes an O-ring cushion which absorbs the slight operation motion required while preventing extrusion of the diaphragm material into the piston-to-cylinder clearance.
Gold Contacts - May be required for applications where less than 12VDC and 20 Milliamps
