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Pressure Switch 1
  • Pressure Switch 1

Pressure Switch

Model:LFAS
Brand:LEFOO
Origin:Made In China
Category:Electronics & Electricity / Electric Control System
Label:Pressure Switch , differential Switch , Switch for HVAC
Price: -
Min. Order:100 pc
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Member Information

Detail

Zhejiang LEFOO Industrial Co.,Ltd.

Free MemberZhe Jiang - China
Live Chat:Last Online:08 Aug, 2011

View all products. (20)

Product Description

The LFAS employs a differential pressure to actuate a precision snap switch at chosen pressure setting. This may be the difference between atmospheric and a negative or positive pressure or between any two given pressures. When a change of pressure occurs between the negative pressure chamber and the positive pressure chamber the main diaphragm activates the snap switch at a pre-determined value.
　
The LFAS pressure cut-off switch is manufactured from selected compound derivatives of polycarbonate & PBT offering exceptional thermal and dimensional stability at elevated temperatures up to 105℃ when used in contaminated atmospheres of air, products of combustion, L.P. or natural gas. It has been designed to meet the low pressure, high temperature specifications of future generations of fanned gas and similar appliances where differential pressures form part of an integral control systems.
　
Typical Applications:
  •        Detects air flow in forced draught appliances
  •        Signals either positive, negative or zero air movement
  •        Shut down burner in blocked flue conditions
  •        Guards against poor or hazardous combustion
  •        Indicates dirty or inefficient filters
Model
LFAS
Media
Air , products of combustion, L.P. or natural gas
Mounting /Fixing
4 screws with maximum penetration depth of 6.3mm into appropriate mounting holes, or fixed with optional bracket.
Mounting Position
The LFAS is position sensitive. It may be mounted in most positions provided it has been calibrated.
Field Adjustable Range
0.4mbar to 8.0mbar make on positive or negative pressure rise. Minimum upper switching pressure 0.4mbar. Minimum lower switching pressure 0.2mbar.
Switch Differential
Not less than 0.1mb and not greater than 0.3mb depending on pressure settings.
Maximum Operating Pressure
10mbar   Pmax=50mbar. 
Operating Temperature Range
105℃  Maximum
Electric Rating
125V,250V, 5A single pole on-off or single pole change over. Other ratings are available on request.
Contact Arrangement
SPDT or SPST
Terminals
6.3 or 4.88 mm male Q.C. Optional insulation cover available as necessary.
Calibration
LFAS switches are normally calibrated at their lower switching pressure in accordance with customer requirements.
Ramp rate at switch point=0.03mb/second
Calibration Tolerance
Standard production tolerance at ambient temperature is ± 0.10mb or ± 5% of set point, whichever is the greater.
Pressure Connections 6mm O.D. push on or "Permifix" tubing. The lower (negative) connector may be supplied in any one of four positions for ease of installation. 


Conversion: 1mbar=100Pa    1"W.C.=1 in/H2O =249Pa

Product Image

Pressure Switch 1
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Send Inquiry to this Member

Zhejiang LEFOO Industrial Co.,Ltd.

Weishiwu Road Economic development zone Yueqing, Zhejiang, 325600,China

Phone:
86-577-27826727
Fax:
86-577-27825222
Contact:
Sandy Wang (Sales Rep.)
Mobile:
86-577-27826727

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