Common faults and solutions of high-pressure pressure gauge

Fault 1: Pointer does not return to zero. Cause analysis: Permanent deformation of the elastic element (overpressure use), wear of the movement gear, or disorder of the balance spring, temperature influence (high temperature causes zero drift). Solution: Slight non-return to zero (<5% of the range): Can be corrected by adjusting the zero screw. Severe non-return to zero: Replace the gauge core and check whether the system is overpressure. Fault 2: Pointer vibrates violently. Cause analysis: Installed at the pump outlet without a buffer system, there is a water hammer effect, and the gauge is not filled with liquid. Solution: Install a pulsation damper or needle valve, check the system check valve, and replace with an oil-filled shockproof pressure gauge. Fault 3: Condensation/water ingress inside the dial. Cause analysis: High ambient humidity and large temperature difference, aging of the case sealing ring, and moisture entering after oil leakage in the filled gauge. Solution: Replace the sealing ring. For harsh environments, choose an IP65/IP67 protection level. For oil leakage in the filled gauge, the entire gauge needs to be replaced. Fault 4: Inaccurate readings. Cause analysis: Overrange use leads to fatigue of the elastic element, direct contact with high-temperature media causes thermal deformation, and long-term lack of calibration. Solution: Regular calibration (recommended every 6-12 months). For high-temperature conditions, install a condenser tube or radiator to ensure the working pressure is within 1/3 to 3/4 of the range. Fault 5: Broken/leaking gauge glass. Cause analysis: Overpressure burst (non-explosion-proof model selected), external impact, sealing failure of the oil-filled gauge. Solution: For high-pressure conditions, be sure to choose an explosion-proof model with a pressure relief hole. Replace the gauge glass or the entire gauge. Check whether the system safety valve is normal. Maintenance advice: Establish a regular calibration system every 6 months. High-pressure gauges are mandatory verification measuring instruments. Do not sacrifice the greater good for the sake of small losses.