What are the advantages and disadvantages of Check Valve?

The Check Valve is composed of valve body, valve cover, valve rod, column, orifice frame, sealing ring, handwheel and other components. When the handwheel rotates, the valve rod moves back and forth through the up and down motion of the middle of the hole bracket. Complete the opening and closing function of the Universal Valve. The plunger in the valve and the sealing ring are excessively interlocked. By adjusting the flange bolts in the cover, the lateral force of the sealing ring compression and the cylindrical sealing of the hole surface in the valve body and the plunger are achieved to ensure universal The sealing performance of the valve prevents external leakage, and at the same time, the opening and closing torque of the Universal Valve is small, allowing rapid opening and closing of the Universal Valve. Check Valve have a longer life than block valves and can save operations. However, the adjustment stroke is longer than that of a cut-off valve, so throttling control is more difficult than that of a cut-off valve.

The Check Valve is composed of a stainless steel column plug, two upper and lower elastic sealing rings and a metal frame. The sealing effect is achieved through the close cooperation of the sealing column and the sealing ring. When opening and closing the cylinder, the plunger moves slowly in the sealing ring, and the contact surface is almost not worn. When closing, the plunger inserts into the sealing ring and cuts off the flow channel. When open, the plunger is away from the lower seal but is built into the upper seal. Please isolate it from the outside to avoid leakage. The surface of the Check Valve is processed with a high-precision cylindrical grinder. The sealing ring adopts new sealing material with strong elasticity and high wear resistance. Therefore, the life of the Check Valve is increased.
1. Flow channel: straight-through type.
2. The valve body and valve cover are made of cast steel or steel castings, and the plunger, Valve Stem and isolation ring are made of stainless steel. The sealing ring is flexible graphite or polytetrafluoroethylene.
3. The sealing ring and isolation ring are tightened by the bolts, nuts and spring pads connecting the valve body and valve cover.
4. Sealing is achieved by the outer diameter of the plunger and the inner diameter of the sealing ring.
5. The valve opens and closes slowly.