1. The reason why this condition is not opened when the specified pressure is reached is that the constant pressure is not allowed. The amount of spring compression or the position of the weight should be readjusted; the valve flap sticks to the valve seat. The safety valve shall be manually deflated or drained periodically; the leverage of the lever-type safety valve is jammed or the hammer is moved. The weight position should be readjusted and the lever should move freely.
2, less than the prescribed pressure is mainly open pressure is not allowed; spring aging elasticity decreased. Tighten the adjusting screw or replace the spring properly.
3, after the discharge valve does not return to the seat This is mainly spring bending valve stem, valve disc installation position is not correct or was caused by the stuck. Should be re-assembled.
4. The frequency jump or vibration of the valve is mainly due to the too high spring stiffness. Should use a spring with appropriate stiffness; improper adjustment of the adjustment ring will make the pressure in the seat back too high. The position of the adjusting ring should be readjusted; the discharge pipe resistance is too large, resulting in excessive discharge back pressure. The discharge pipe resistance should be reduced.
5. The pressure continues to rise after exhausting. This is mainly because of the safety discharge volume of selected safety valve discharge equipment. The appropriate safety valve should be selected again; the stem centerline is not correct or the spring is rusted, so that the valve disc cannot be opened to The height should be re-assembled valve stem or replace the spring; exhaust pipe cut enough, should be taken to meet the safety discharge area of ​​the exhaust pipe.
6. Safety Valve Leakage Under normal working pressure of the equipment, leakage beyond the allowable level occurs between the disc and the sealing surface of the valve seat. The reasons are: There is dirt between the valve flap and the sealing surface of the valve seat. Use a lifting wrench to open the valve a few times to flush away the dirt; the sealing surface is damaged. Should be based on the degree of damage, grinding or grinding after grinding method to repair; valve stem bending, tilting or deflection of the lever and fulcrum, so that the spool and valve disc misalignment. Should be reassembled or replaced; spring elasticity reduced or lost elasticity. Replace the spring and readjust the opening pressure.
2, less than the prescribed pressure is mainly open pressure is not allowed; spring aging elasticity decreased. Tighten the adjusting screw or replace the spring properly.
3, after the discharge valve does not return to the seat This is mainly spring bending valve stem, valve disc installation position is not correct or was caused by the stuck. Should be re-assembled.
4. The frequency jump or vibration of the valve is mainly due to the too high spring stiffness. Should use a spring with appropriate stiffness; improper adjustment of the adjustment ring will make the pressure in the seat back too high. The position of the adjusting ring should be readjusted; the discharge pipe resistance is too large, resulting in excessive discharge back pressure. The discharge pipe resistance should be reduced.
5. The pressure continues to rise after exhausting. This is mainly because of the safety discharge volume of selected safety valve discharge equipment. The appropriate safety valve should be selected again; the stem centerline is not correct or the spring is rusted, so that the valve disc cannot be opened to The height should be re-assembled valve stem or replace the spring; exhaust pipe cut enough, should be taken to meet the safety discharge area of ​​the exhaust pipe.
6. Safety Valve Leakage Under normal working pressure of the equipment, leakage beyond the allowable level occurs between the disc and the sealing surface of the valve seat. The reasons are: There is dirt between the valve flap and the sealing surface of the valve seat. Use a lifting wrench to open the valve a few times to flush away the dirt; the sealing surface is damaged. Should be based on the degree of damage, grinding or grinding after grinding method to repair; valve stem bending, tilting or deflection of the lever and fulcrum, so that the spool and valve disc misalignment. Should be reassembled or replaced; spring elasticity reduced or lost elasticity. Replace the spring and readjust the opening pressure.
The cable trailers are used for power sector operations. It is suitable for overhead engineering of power and communication lines, which is convenient for cable consignment and exhibition.
The cable drum trailer is designed for transporting and uncoiling telecommunication and light power cables.The drum trailer provides a compact and secure method of drum transportation. Manufactured in strong steel sections, it incorporates manually operated hydraulic lifting of drums.
The cable reel trailer is the new generation of cable trailer, which integrates the function of drum hauling, cable pulling, cable pushing, guiding and tight into a whole. Equipped with automatic braking device, it can brake effectively only by moving clutch. With compact design and flexible steering function, it can be operated under narrow work site. Simple operation and easy maintenance, it is a necessary tool for electric power construction.
Features:
1. Used for cable drum hauling and cable pulling-pushing. With a high load-bearing capacity.
2. Adopt mechanical lifting method, simple operation, stable and durable. The traction tire on the font of cable trailer can change angle at random and easy to move.
3. Equipped with damping device, and the stability of trailer was increased greatly.
Cable Reel Trailer, Cable Drum Trailer, Hydraulic Cable Drum Trailer, Cable Trailer
Taizhou Haoxin Electric Power Machine Co., Ltd. , https://www.hxstringingequipments.com