Notes on shut-off valves (throttle valves)

Shut-off valves (throttle valves) without seal inside the valve

 
The valves listed up on pages 64-65 are flanged on both sides for pull-ring
connections.

Both shaft openings are sealed with a O-ring seal of Viton and with a O-ring seal of conductive EPDM in order to carry off charge of the inside valve to the housing.
Temperature resistance from -50 up to +120 °C.


Up to a diameter of 300 mm the valve is certified to be shock-explosion proof to the
outside up to 3 bar over-pressure. Diameters of 350 to 400 mm are available in flanged version for pull-ring connections (not shock-explosion proof) or with loose flanges.

Diameters over 400 mm are installed with loose flange according to DIN 24154, T2,but without counter-flange. Flanges see page 108. The shafts have ball-bearings and are sealed with a O-ring of Viton.

Up to a diameter of 630 mm shock-explosion proof to the outside up to 3 bar.
Prices on request.


Shut-off valves (throttle valves) with seal inside the valve


The valves listed up on pages 66-67 are flanged on both sides for pull-ring connections.

Standard finish with seal of Silicone of the inside valve.

Other rubber materials on request.
Both shaft openings are sealed with a O-ring seal of Viton and with a O-ring seal of conductive EPDM in order to carry off charge of the inside valve to the housing.
Temperature resistance from -50 up to +120 °C.


Up to a diameter of 300 mm the valve is certified to be shock-explosion proof to the outside up to 3 bar over-pressure. Diameters over 300 mm are installed with welded-on flanges according to DIN 24154, T2, but without counter-flange. Flanges see page 108.

 

The seal is placed on the whole inside area of the valve. The shafts have ball-bearings
and are sealed with a O-ring of Viton. Up to a diameter of 630 mm shock-explosion proof to the outside up to 3 bar. Prices on request.

 

 


 

 

Pneumatic rotary actuators (IP 65)

Required air pressure 5 bar. Switch-over time for 90° < 3 seconds. On the rotary actuator a 5/2-way-solenoid-valve (1 coil) with auxiliary hand operation and spring reverse is mounted, with compressed-air connection for fabric air hoses of 8 mm clear width. As a standard the valve is closed without power supply.


2 limit switches potential-free 4-250 V with bounce-free gold contacts for SPS controls
and suitable for amperages up to 5 A, mounted to the actuator in a limit switch box. Solenoid-valve and limit switch wired on terminals in a limit switch box.

 


 

Electrically operated Belimo valve actuators (40 Nm, IP 42)


Overload proof, in standard version without limit switch. The valve remains under

tension in the respective end position. Consumption approx. 4 watt. Switch-over time for 90° approx. 180 seconds.


Due to the limited torque valves over 350 mm or over 200 mm for the version with
sealing are not available.


Limit switches that can be set variably to switch off and to inform about the status or potentiometers can be delivered with extra charge.

 


 

Electrically operated adjustable drives Deufra (IP 65)


1-phase, with emergency hand operation. Switch-over time for 90° approx. 6 seconds.

2 variably adjustable potential-free limit switches and thermal circuit breaker integrated in the actuator.


Prices for heating, potentiometer, position controller on request.

 

 

 


 

Directive 94/9/EG (ATEX)


Depending on the actuator ATEX versions for the surroundings of the valves can be delivered in Ex II 2/3 G/D c IIB T4 X with extra charge.

Inside the valve housing Zone 0 and 20 are admitted for versions without seal of the inside valve.

For versions with seal of silicone of the inside valve Zone 20 is admitted inside but not Zone 0. If Zone 0 is required, conductive seals without food quality are necessary

 


Available special versions – prices on request.


Housing material 1.4571.
Versions for higher temperatures, actuation mounted 100 mm away from the housing for insulation on site.

Actuators, solenoid valves and limit switches acc. to customer's specifications.


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