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Safety valve installation and its use should pay attention to

■Exhaust Pipe of Safety Valve An exhaust pipe and an drip pan elbow should be installed so that a safety valve may not be subject to stress caused by the thermal expansion of a boiler or equipment and by the expansion or contraction of a discharge pipe due to the thermal action of blowout of the safety valve. (See Fig.1.) The inner diameter of a exhaust pipe should be as larger as possible than that of an outlet pipe of a safety valve, and the exhaust pipe should be lead to outside or a safe place.
■Installation of Safety Valve 1. Do not remove the blind plate before completing the preparation for installation so that any foreign matter does not come into a safety valve. 2. Be sure to remove foreign matter completely from equipment, pipes, and vessels by washing their insides before installation. 3. In installing a safety valve, do not apply a pipe wrench, etc. to the places other than the specified ones. 4. Do not apply any force from the outside. 5. Equip a valve casing and a exhaust pipe with a drain pipe for each to prevent raindrops and dirt, etc. from accumulating
1. Do not disassemble or readjust the product unnecessarily because pressure adjustment is completed. If disassembling and readjusting the product unnecessarily, it is dangerous because function of the product is not accomplished, such as not discharged at set pressure, or discharge at less than set pressure.
2. Most of problems with the pressure reducing valve are caused by foreign substances and scale in the piping. Be sure to remove them before using the product. Note that the customer is required to pay repair charge for any defect that occurs due to foreign substance inside piping or scale.
3. Install the product so that the product cannot receive excessive load, torque or vibration.
4. Install the product correctly, checking fluid flow direction and direction of inlet and outlet
5. Do not use the product for device or equipment which cannot accept valve seat leakage because the product which do not use soft seat on valve seat face have valve seat leakage within acceptable range.
6. Except for handle type, do not rotate adjusting screw. If doing so, the product may discharge at lower than set pressure, or not discharge at set pressure



pressure safety valve working principle
spring loaded safety valve
safety valve in boiler
safety valve pdf
standards for safety valves (is codes)
safety valve parts
pressure safety valve manufacturers
safety valve symbol
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