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Recent News

Pressure Holding Valves 2018-10-16

In certain applications venting of the actuator has to be avoided in case of pressure failure. For this purpose Hafner has developed the so-called pressure holding valve.

From a technical perspective the pressure holding valve is a double non-return valve which is blocking the air-flow when neither at port P1 nor port P2 any pressure is applied.

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New Air Filter Regulator Meets NACE Requirements for Corrosive Environments 2018-10-16

ControlAir Inc. is pleased to announce the introduction of the Type-335 NACE Filter Regulator. This unit incorporates all of the operating features of ControlAir’s Type-330 Filter Regulator, but is constructed of materials that meet NACE specification #MR-0175 for sulfide stress cracking.

Features:
 NACE COMPLIANT MATERIALS – all materials of construction meet NACE MR-0175 requirements for corrosive resistance
 INTEGRAL THROUGH-BOLT MOUNTING – to most popular industrial valves
 STABLE OUTPUT and REPEATABILITY – provides constant control under variable flow rates and supply pressures
 LOW AIR CONSUMPTION – decreases operating cost
 TAPPED EXHAUST – allows remote venting media
 1/4" NPT PORTING – 2 gauge ports
 COMBINATION OF ALUMINUM BODY and STAINLESS STEEL TRIM – offers lower cost alternative to all stainless steel
 VITON ELASTOMERS
The Type-335 NACE Filter Regulator is designed specifically for use in corrosive sour gas environments and provides instrument quality air to valves, pneumatic controllers, transmitters, transducers, valve positioners, air cylinders, and a wide range of pneumatic control systems. The Type-335 NACE is ideal for gas and oil field applications. Other applications include petrochemical processing, both on and offshore; food; pulp and paper; pharmaceutical processing; pollution control; wastewater treatment and research projects.

The Type-335 NACE Filter Regulator is available in 1/4” NPT porting. Output ranges include 0-30 psig (0-2 BAR), 0-60 psig (0-4 BAR) and 0-100 psig (0-7 BAR). Maximum supply pressure is 250 psig (17 BAR). Standard mounting allows for pipe or through body. Temperature limits range from -20º F to 180º F (-29º C to 82º C). Flow capacity is 20 scfm at 100 psig supply with 20 psig output. Exhaust capacity is 0.1 scfm (2.83 Nl/min) with downstream 5 psig (0.3 BAR) above set point. Air consumption is less than 5 scfh. Effect of Supply Variation is less than 0.25 psig (0.017 BAR) for 25 psig (1.7 BAR) change. The Type-335 NACE Filter Regulator weights 1.2 lb (.45 kg).

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