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CRIMPED METAL IN-LINE / VENT-LINE
FLAME ARRESTER & DETONATION FLAME ARRESTERS
Series Nos. 25000/26000 & 30000
Installation and Maintenance
INSTALLATION
If any questions arise concerning the proper installation of vents, please contact Protectoseal or one of our Authorized Representatives.
CAUTION:
When installing any Protectoseal venting device, the legal, corporate and advisory safety regulations and procedures appropriate for the specific installation site must be fully understood and followed.
| Note 1: |
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The handles on the arrester element are to be used for lifting and removal of the element only during inspection and maintenance procedures. The handles should not be used to lift the entire arrester.
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| Note 2: |
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Protectoseal arresters are passive devices with no moving parts. No adjustment, modification or calibration of the device is required.
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PROCEDURE:
- Remove all packing materials and flange protectors from the arrester. Check inside the arrester housings for loose packing materials.
- The arrester is intended to be mounted to piping and flange connections of a size equivalent to the size of the arrester mounting flanges.
- The installation of the arrester is by flanged connection to the pipe work. The arrester should be positioned between its mating flanges with a gasket appropriate for the service conditions. If the arrester is to be mounted horizontally, it should be positioned so that the element spacer rings are located under the element housing, able to support the element during maintenance operations. Flange bolts should be tightened evenly and alternately to provide a secure seat at the gasketed joints.
MAINTENANCE
If any questions arise concerning the proper maintenance of vents, please contact Protectoseal or one of our Authorized Representatives.
CAUTION:
When maintaining any Protectoseal venting device, the legal, corporate and advisory safety regulations and procedures appropriate for the specific installation site must be fully understood and followed.
| Note 1: |
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In normal service, it is suggested that the arrester be inspected at each regularly scheduled facility maintenance period or, at a minimum, annually.
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| Note 2: |
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The arrester should be inspected if excessive pressure drop, at some known flow rate, is encountered.
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| Note 3: |
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The arrester should be inspected immediately if a flame front is encountered.
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PROCEDURE:
- The arrester is comprised of an arrester element clamped by means of threaded tie rods between two element housings.
- Equipment or structures suitable for supporting the arrester housings and the arrester element should be available prior to disassembly of the device.
- The weight of the element assembly may be supported by attachment to the element handle(s). Caution: The handle(s) are to be used for lifting of the element only. The handle(s) must not be used to lift or support the weight of the entire arrester.
- Loosen the nuts on all the tie rods, and all tie rods except those two rods on which the element sits (in the horizontal mounting position) should be removed.
- Spreader nuts can be used to help separate the housing halves from the arrester element. Spacer blocks, or mechanical spreader tools should be used to separate and secure the housing halves so that the element assembly is free for removal.
- Remove the element for inspection. The gaskets should be inspected and replaced if damaged.
- The arrester element should be inspected visually for damage to the element winding or the support structure. In normal operation, it is unlikely that such damage would be encountered. If the element appears to be damaged, it should be replaced immediately with a new element.
- The arrester element is comprised of a series of small, triangular shaped openings that traverse the width of the element. Inspection for blockage of these openings can be accomplished by viewing a light source through the element passages. For optimum performance, the passages should be clear.
- If blockage of the element passages has occurred, the method of cleaning will depend, to some extent, on the vapors being handled. Some common cleaning methods include:
- a) Solvent wash followed by a compressed air blow through.
- b) Compressed air purge.
- c) High pressure steam purge.
- d) High pressure water purge.
Caution: The element should never be cleaned by the insertion of a sharp tool or probe into the passages. The capability of the arrester to function is based on the integrity of these passages, and damage to them can render the arrester ineffective.
- Position the clean element and replacement gaskets between the housing halves. The spacer rings may be used as an aide to proper alignment of the element and the housing halves (in the horizontal position). Reinsert the tie rods and assemble the nuts. Tighten the nuts alternately and evenly to insure proper sealing at the gasket. When the gaskets are supplied by Protectoseal, the recommended torque values for the tie rod fasteners are:
- 2" Units- 50 ft-lbs
- 3" Units- 100 ft-lbs
- 4" Units- 100 ft-lbs
- 6" Units- 150 ft-lbs
- 8" Units- 200 ft-lbs
- 10" Units- 350 ft-lbs
- 12" Units- 450 ft-lbs
- 16" Units- 450 ft-lbs
- 18" Units- 450 ft-lbs
- 20" Units- 550 ft-lbs
- 24" Units- 550 ft-lbs
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