PRESSURE SWITCHES

Pressure switches for gas DG

• Simple switching point adjustment with infinitely adjustable hand wheel
• Monitoring of gas and air pressures (positive and negative pressures)
• Low pressure cut-off for gas and air (differential pressure)
• Pressure switch with internal lock and manual reset
• Suitable for biologically produced methane (can be used on pipes with Zone 2 explosive atmospheres without isolating amplifier)
• Can be used in Zone 1 and 2 hazardous areas with an approved isolating amplifier
• International approvals
• RoHS 2002/95/EC
• EC type-tested and certified pursuant to EN 1854 and class “S”
• TüV test as a special-design pressure switch pursuant to TRD 604
• UL listed, FM and AGA approved
• Certified pursuant to GOST-R
• Certified for systems up to SIL 3 and PL e

Application

The gas pressure switch DG monitors extremely low pressure differentials and triggers switch-on, switch-off or switch-over operations if a set switching point is reached.

The switching point is adjustable between 0.4 and 500 mbar via a hand wheel. It monitors gas pressures on various industrial gas and air appliances, such as boiler fan monitoring and differential pressure monitoring in firing, ventilation and air-conditioning systems.

The TÜV-tested special-design pressure switch is used as defined by VdTÜV Code of Practice “Druck 100/1” (Pressure 100/1) in firing installations for steam and hot-water generators in accordance with TRD 604, Para.3.6.4, as well as class “S” for DG..B, DG..U and DG..I pursuant to EN 1854.

The pressure switch for gas DG can be used as positive pressure switch, vacuum sensor or differential pressure switch for air, flue gas and other non-aggressive gases. It is also suitable for biologically produced methane.

Pressure switches for air DL..

Diaphragm pressure switches with micro switch (silicone-free versions available) for monitoring air pressures on industrial and commercial installations, for positive pressure, negative pressure and differential pressure, for air and flue gas, partly suitable for use as special-design pressure switches, EC type-tested and certified pursuant to the Gas Appliances Directive (90/396/EEC) and the Low Voltage Directive (2006/95/EC) in conjunction with EN 1854.
Switching ranges: 0.2 to 50 mbar.
With tube connection and switching point set at factory.
The following versions are available:
Pressure switch with gold-plated contacts for voltages of < 24 V,
Pressure switch with test tapping point,
NO contact or change-over contact.

Pressure switches for gas DG..C

• Little space required thanks to compact dimensions
• Double pressure switch for minimum and maximum gas pressure monitoring in one unit
• Fixed switching point pre-set as desired at the factory
• Simple switching point adjustment with infinitely adjustable hand wheel
• Recyclable, no composite materials
• Suitable for natural gas, town gas, LPG, flue gas, biologically produced methane and air
• Several connection facilities using various lower sections
• Available with sealant-coated external thread
• EC type-tested and certified
• UL listed, FM and AGA approved
• Certified pursuant to GOST-TR
• Certified for systems up to SIL 3 and PL e
• RoHS compliant