WITT Flash Back Arrestor for Regulator

WITT Flash Back Arrestor for Regulator - RF-53N

The WITT Automatic Flashback Arrestors RF 53 N, 85-10 and 85-30 incorporate:

Description

• Large surfacemesh filterto remove dirt particles from the gas to improve service life of the arrestor.
• Spring loadednon-return valveto prevent slow or sudden backfeeding. It is protected from flashbacks by the downstream arrestor element.
• Large surface areaflame arrestorof sintered stainless steel to extinguish any flashback entering the device in any direction. The cylindrical shape gives high flow capacity.
• Temperature activated valveto cut-off the gas supply before the internal temperature reaches a dangerous level. The sealing element is shrouded from flashbacks and the valve closes in the same direction as the gas flow ensuring that it cannot be re-opened by the gas inlet pressure.

WITT Automatic Flashback Arrestors RF 53 N, 85-10 and 85-30 conform to EN 730-1, ISO 5175 and other national standards.

Tests: Every WITT Arrestor is tested individually for body leaks, non-return valve funktion and is subjected to flashback testing at the maximum rated operating pressure in accordance with ISO standards or those of the country of sale.

Maintenance: No maintenance is required. Nevertheless it is recommended that at annual intervals the units are tested with clean dry air or nitrogen for body leakage and against reverse flow.

Test specifications and test equipment available on request.

Installation: The WITT Automatic Flashback Arrestor may be installed at regulator or pipeline outlets. For pipeline use a shut-off valve should be fitted immediately upstream of the arrestor. If there is a danger from water vapour being carried with the gas, then a seperator should be installed upstream. Not more than one process unit may be connected to one flashback arrestor. It may be mounted horizontally, vertically or any other position. The maximum working temperature is 70° C.

Repairs: Detective units as well as units with temperature activated cut-off valve closed should only be serviced by the manufacture or his authorised local representative as it requires full testing including flashback testing after reassembly. The change of the dirt filter is not part of this requirement and can easily be carried out.

Tests: Every

Operation / Usage

• The Flashback Arrestors E460-1, E460-3 and E460SK may be installed at the inlet of the blowpipe.
• The E460SK with integrated coupling body conforming to EN 561 / ISO 7289 makes possible the use of the WITT-Couplingsystem SK100 for the fast connection and disconnection of the blowpipe. The E460-2 is for the installation in the hose – not nearer than 1 m in front of the blowpipe.

Maintenance

• annual testing of the non-return valve, body leak tightness and flow capacity is recommended
• WITT is happy to supply special test equipment
• Flashback Arrestors are only to be serviced by the manufacturer. The dirt filter may be replaced by competent staff

Approvals

• Company certified according to ISO 9001:2000 and ISO 14001