Welding Accessories

WELDING ACCESSORIES

BODY : Bar Stock Stainless Steel – 316
Bonnet: Bar Stock Stainless Steel – 316
Diaphragm : Stainless Steel with PTFE cover
Gauges : 21/2″ dia
Relief Valve : Safety valve relieves pressure in case of over
Pressurization
Inlet / Outlet : As per is or as per party’s requirement needle valve provided on out let

Spring loaded holder is designed for maximum safety, comfort and high productivity. Minimum contact area of conductivity and high grip cable connection. avoids heat transfer to handle.

SPECIAL FEATURES

Three electrode insert position with positive stop and easy to operate by left hander and right hander
Dense pressure forged conductivity parts
Insulated parts withstand 1500 arc resistance. / high impact strength.
Firm electrode grip reduces heat generation.
Low profile leverage reduces welder’s fatigue and down time for change of electrode.
High heat resistant non corrosive fully insulated stainless steel spring.

Material of construction
Body/Bonnet : Forged/Bar– Brass
Poppet : Stainless Steel
Seat / Seal : Nylatron
Diaphragm : Reinforced Fabric Synthetic Rubber
Pressure adj. Screw Stainless Steel

Application

Brazing
Cutting
Heating
Welding
Beverages
Bubbling Control
Calorimetry
Chromatography
Process control
Purging
Research lab

Technical Data

Inlet Pressure : 200 Bar Maximum
Delivery Pressure : Adjustable 1 to 150 bar
Fluid Media : Non corrosive gases
Temperature range : –40^oC to + 70^oC
Body Ports : ¼” / ½” npt female
Pressure Gauges : 50 mm / 65 mm diameter
Wetted Area Parts : Ultrasonically cleaned corrosion resistance

TEST

Every BOC Flashback Arrestor is tested individually for body leaks, function of its non-return valve, cutoff valve and relief valve and is subjected to flashback testing at the maximum rated operating pressure in accordance with ISO Standards or those of the country of sale.

MAINTENANACE
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 for proper function of the valves. Test specifications and test equipment available on request.

REPAIR
Defective units should only be serviced by the manufacturer or his authorised local representative as full testing including flashback testing after reassembly is required. The change of this dirt filter is not part of this requirement and can easily be carried out.

INSTALLATION
The BOC F I Flashback Arrestor maybeinstalled at regulator or pipeline outlets. For pipelines use a shut-off valve should be fitted immediately upstream of the arrestor. If there is a danger from water vapor being carried with the gas, then a separator should be installed upstream. The arrestor may be mounted horizontally, vertically or any other position. The maximum working temperature is 70°C.C

Large surface mesh filter to remove dirt particles from the gas to improve service life of the arrestor.
Pressure activated cut-off valve to isolate gas supply after each flashback, severe back pressure and pressure differential caused by upstream leaks. The valve closes in the same direction as the gas flow ensuring that it cannot be reopened by the gas inlet pressure. Operation is indicated by a signal lever, after resetting the lever, the arrestor is again ready for immediate operation.
Spring-loaded non-return valve to prevent slow or sudden backfeeding. It is protected from the flashbacks by the downstream arrestor element.
Temperature activated cut-off valve cuts off the gas supply automatically if internal temperature reaches a dangerous level. This may be caused by internal burning or external fire.
Large surface area flame arrestor of sintered stainless steel to extinguish any flashback entering the device. The cylindrical shape gives high flow capacity.
Explosion pressure relief valve to vent excessive pressure to atmosphere protecting the downstream hose. Products of combustion and debris created by a flashback are also vented here to minimise deposits on the arresting element extending the service life. BOC F I Flashback Arrestor, conform to EN730, ISO 5175 and other national standards (details on request)