discount 70% in 2018-09-25 to 2018-09-27
price: USD$ 413.00
freight :USD$7.00,(Postal parcel)
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Type A21H is suitable for the work temperature are less than 200 of the air, ammonia, oil gas and other media equipment and pipeline. Type A21W is suitable for the equipment and piping of gas or liquid in the working temperature are less than 200 corrosive on the A21F type suitable for temperature are less than 200 of the liquefied gas, oil gas and other equipment and pipeline, as the overpressure protection device. When the equipment and pipeline internal pressure exceeds the allowable value, the valve automatically opens, then the whole amount of emissions; when the pressure is reduced to the specified value, the valve automatically closes to ensure the safe operation of equipment and pipeline.
Main connection size: