Three way pneumatic ball valve: Q44F, Q45F, Q44H, Q45H, Q644F, Q645F, Q644H, Q645H, Q944F, Q945F, Q944H, Q945H;

Difference between metal compensator and non-metal compensator
Metal compensators are also called expansion devices, expansion joints and corrugated compensators. In ordinary industry, Zeng Guang fan uses metal compensators to stop compensating the axial, transverse and angular thermal deformation of the pipeline to ensure the safe operation of the pipeline. Metal compensators have bellows expansion joints, which are convenient for the installation and disassembly of valve pipelines. Metal compensators absorb the vibration of equipment, Metal compensator can reduce the influence of equipment vibration on pipeline
The metal compensator can absorb the deformation of the pipeline caused by earthquake and settlement. The design temperature of the contraction joint of the metal bellows is lower than the creep temperature of the material, The experimental temperature is room temperature. The experimental pressure of the metal compensator is equal to the design pressure. The pressure oscillation value of the metal compensator does not exceed+- 10% of the experimental pressure. The cyclic displacement of the metal compensator should be axial displacement. The displacement range of the experimental cycle should be equal to the design axial displacement or the design equivalent axial displacement. Stop measuring the test cycle rate of the metal compensator. Confirm that the displacement in each ripple is evenly distributed Time required, less than 25mm/s
Both metal and non-metallic compensators are called contraction joints. All inspection samples in the inspection of contraction joints meet the requirements and pass the type inspection. It is assumed that the materials and bellows are unstable under pressure, fatigue performance does not meet the requirements, and the type inspection is unqualified. If the items do not meet the requirements, re inspection and re inspection are allowed; A retest is allowed if the request is met
The type inspection of metal and non-metallic compensators for contraction joints is still qualified. If there are still some items that do not meet the requirements in the re inspection, the type inspection of compensators is unqualified