In need high pressure fluid, also need high pressure fluid in the hydraulic system, pressure reducing valve is often used to provide high pressure liquid. D - JF1 pressure reducing valve is reliable in action, convenient and flexible, stable working voltage regulator such outstanding advantages. 1. The working principle of D - JF1 pressure reducing valve by valve body, valve core and Industrial Valves seat, piston, relief valve, regulating screw, accumulator, guide sleeve, pressure ring, filters, etc. The seat and piston is sliding up and down. D - JF1 pressure reducing valve working principle: use of clearance throttle valve core and valve seat, make the output pressure is lower than the input; Output pressure feedback at the same time, the effect on the piston, and the gas spring force form a dynamic balance, automatic regulating valve core and valve seat, the gap between the output pressure constant. In the process of work, the change of fluid pressure, will instantly change the stress of the piston, piston was forced to lift. core are together always upward, making the valve core with piston lift at the same time, until you reach a new equilibrium position, so as to maintain a constant pressure regulating value. Accumulator prefi lled within certain pressure of nitrogen, for gas spring. Using the adjusting screw change accumulator pressure to achieve the D - JF1 relief valve pressure regulation. Slowly open into the liquid side screw, high pressure liquid into the lower part of accumulator and nitrogen gas is compressed, higher pressure, the piston moves down, increase seam Industrial Valves, throttle effect is abate, outlet pressure increase, On the other hand, open side screw of produced liquid, the liquid is reduced, pressure drop, the piston upward, outlet pressure decreases. 2. The existing problems and improvement measures, 1) If accumulator accumulator of leak into the water, the water there are bubbles found accumulator leakage, this is most improper charging valve seal. D - JF1 relief valve accumulator charging valve adopts an M8 socket head cap screw, along the long cut in the thread of a plane, with a combined sealing gasket to seal, the structure is simple, but easy to leak, pneumatic seal and check the gas pressure must be special tools. ( 2) Adjustment screw discharge D - JF1 pressure reducing valve is a valve cone. Due to the structure and manufacturing it is hard to make it close to death without leakage. After modification with a steel ball seal, the effect is very good. ( 3) Piston awful a card at the highest level in to match the live the great circle of the upper guide sleeve inner hole, there are two holes, medial burr after drilling, the piston guide sleeve at the awful a card, make the output flow rate and pressure are low and cannot meet the requirements. The better way is will it increase a relief groove, go to the best of the upper guide sleeve hole inside burr on the two holes. ( 4) O ring is easy to cut the bad guide sleeve diameter of the original design of the body and guide sleeve sealing of holes in the O ring in the body, for ease of processing, we are located in the guide sleeve, but not body orifice Angle of 20 °, the assembly when the O ring is easy to be bad. 3. Common failures and troubleshooting methods ( 1) Don't decompression (1) pressure is too high, check and inflatable to 2. Five to four. 5MPa； (2) on the left side of the adjust screw leakage, repair the light cone hole inside connection at the bottom of the hole; (3) the seam valve opening is too large, the piston awful a card in the lowest, the piston and guide sleeve with different heart, polishing step holes. ( 2) Outlet pressure is too low, not on (1) the accumulator leakage. Check and inflated to the specified value; (2) the right side of the adjust screw discharge. Repair the light inside the link at the bottom of the hole taper hole; (3) the seam valve opening is too small, the piston leaves at the highest level. Guide sleeve down, polishing step holes. ( 3) Outlet pressure fluctuations, unstable (1) the accumulator leakage, check and inflated to the specified value; (2) left and right side of the adjusting screw seal bad, connection of light cone hole at the bottom of the hole. 4. Considerations for daily application note the following two points: ( 1) Often clean the filter; ( 2) Regularly check the accumulator gas pressure and gas to the specified value.
Over the years, has become very popular as more and more people are trying it out.
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