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Ammonia shut-off valve works and precautions (Figure)
Ammonia gas hydraulic cut-off valve is a new type of dangerous goods safety valve, which uses the cut-off valve lift structure and check valve to prevent media backflow principle. Mainly used in emergency situations can quickly close the storage tanks at the entrances and exits, installed in the liquefied gas. Liquid ammonia and gas-related pipeline, and long-distance hand oil (SB03-175 type) supporting the use of Hydraulic control valve open - closed, so that a large number of pipes or tanks in the event of a leak or even a fire, the manual pump to relieve pressure or high temperature fusible alloy melt, and cut off the valve cylinder automatic pressure relief, the valve quickly closed Stop leakage, play a personal safety and protection. Ammonia emergency shut-off valve works: Need to install more than emergency shut-off valve should use two hand pump control, one of the pumps work another pump spare to prevent the pump damage the valve does not work, each Emergency shut-off valve with a (J23H-40P) needle valve control. Ammonia emergency shut-off valve of the main performance specifications: Pressure level: 20K 4.0MPa Cylinder working pressure: ≤ 6.0 Mpa Operating temperature: -40 ~ +80 ℃ Cylinder using medium: hybrid spindle oil. Transformer oil Medium: natural gas, liquefied petroleum gas , Liquid ammonia Fusing time: ± 70 ℃ Closing time: ≤ 10 seconds Cylinder opening pressure: ≥ 2.0MPa Body material: Carbon steel WCB stainless steel 304.316.316L Cylinder, piston chrome stainless steel ring, O-ring: PTFE Ethylene. NBR rubber spring 50CrVA (spring steel) Type: Normally closed ammonia emergency shut-off valve installation precautions: 1. When the custody of the valve of each external access with a plug or cover closed, stored in a dry and ventilated room Long-term storage should be checked regularly to eliminate dirt, and coated with anti-rust oil on the processing surface to prevent corrosion. 2. The valve should be cleaned before installation, tighten the screw connections. 3. Emergency cut-off valve using the principle of check valve, can only want to cut off, the installation must pay attention to the valve logo, the valve will be the protection of the entrance. Valve installation direction: high and low out. 4. Ordering shall be marked flange sealing surface form, pressure rating and connection standards.