PRESSURE SWITCH TYPE USPH 1
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PRESSURE SWITCH TYPE USPH 1 up to 35 MPa Pressure switch type USPH 1 serves to switch an electrical circuit on and off by means of a micro switch under the influence of pressure variations in relation to the set pressure. The pressure switch may be used to control or monitor processes i.e. by means of a visual ( light ) or acoustic ( bell ) indicator. At initial state the piston 2 is held in its lower position by the spring 4 and causes the lever 5 to press the micro switch end 6. Pressure affects the piston which pushes against the spring 4 in the housing 1. The spring force is set by means of the adjustment screw 3 what results in adjusting the desired switching pressure. Switching state lasts as long as pressure force affecting the piston exceeds the spring force. As soon as pressure force decreases, the spring causes the piston to move downward. The piston pushes the lever and switches the micro switch to its initial state. Micro switch can be connected with the light 7 signalling switching on or off.

TECHNICAL DATA Hydraulic fluid Mineral oil or phosphate ester Nominal fluid viscosity Viscosity range Optimum working temperature ( fluid in a tank ) Fluid temperature range Maximum operating pressure Switching repeatibility Maximum contact loading OVERALL DIMENSIONS a) setting element with adjusting screw ,,2'' b) setting element with lackable handknob ,,3'' c) setting element with hand knob ,,1'' WK 450 175

Note : 4 fixing bolts M8 x 25 - 8.8 per PN/M - 82302 ( DIN 912 ) must be ordered seperately. Admissible surface roughness and flatness deviation for a subplate face. Graphical symbol

Orders coded in the way showed below should be forwarded to the manufacturer. Series number connection dimensions remain Pressure range Mounting method Connection type Metric threaded connections ( version R ) = 00 Voltage of control light With no accessory = no code With control light = L Oilproof rubber Setting element Hand knob Adjusting screw Lockable hand knob E-mail: ponar@ponar-wadowice.pl