Copper valve common faults and maintenance

Copper valve opening and closing with jamming, inflexible or not normal opening and closing, or even can not continue to open and close, mainly due to the valve stem and other parts jamming, mainly between the valve stem and packing jamming.

Generally have:
Packing gland skewed after touching the valve stem
--Treatment: correct installation
. Packing installation is not correct or too tight pressure
--Handling method: Packing pre-tighten, loosen packing properly.
Valve stem and packing gland bite
--Handling method: Replace or rework.
Biting or galling between parts
--Handling method: Properly lubricate the valve stem.
Valve sealing surface abrasion, stem light column part bite abrasion and stem thread part bite, etc..
Sealing surface grinding there are abrasive particles embedded in the sealing surface, not cleaned up, resulting in sealing surface abrasion; some by the use of the abrasive particles in the media under the scrubbing, abrasive particles discharged and stick in the sealing surface, by the valve switch, resulting in abrasion.
--Processing methods: reasonable choice of abrasives, sealing surface grinding must be cleaned.
Medium in the spoils or welding slag is not clean, resulting in abrasion.
--Handling method: re-cleaning clean.
Valve stem and packing pressure sleeve, packing pad touching, followed by the medium containing boron in the medium, after the leakage will crystallize to form hard particles, in the packing and stem contact surface, switching strained stem surface.
--Processing methods: correct installation, adjust the parts fit gap and improve the hardness of the valve stem surface. Trapezoidal threads are stained with dirt, poor lubrication conditions; stem and related parts deformation.
--Treatment: remove the spoils, apply lubricant to the high-temperature copper valves in time; correct the deformed parts.

Other News

Features of PFA Flare Type Fittings

PFA material has excellent corrosion resistance, high temperature stability and excellent electrical insulation properties, which makes the PFA flare type fittings have many unique features and advantages.

View Details

Stainless steel metal hose with several types of fittings

Corrugated metal hose Model: tcJR metal hose nominal diameter: DN8 ~ DN400 working pressure: 0.6 ~ 1.0 (MPa)

View Details

What are the standards for stainless steel metal hose?

Stainless steel metal hose is made of stainless steel bellows outer braided one or more layers of steel wire or steel belt mesh sleeve, two ends with a connector or flange head, used to transport stainless steel metal hose a variety of media, flexible components. II. Features:Corrosion resistance, high temperature resistance, low temperature resistance (-196 ℃ ~ +420 ℃), light weight, small size, good flexibility. Widely used in aviation, aerospace, petroleum, chemical industry, metallurgy, electric power, papermaking, wood, textile, construction, medicine, food, tobacco, and other industries. 1. Conveying corrosive chemical medium or organic solvent. (For example: loading and unloading ammonia, acetone, etc.) 2. Conveying high temperature gas, hot oil and other high temperature media. (e.g. hot steam, thermal oil, etc.) 3. Conveying low-temperature or ultra-low-temperature media. (e.g. liquid nitrogen) 4. Conveying water, steam, oil and other media in high temperature environment. (eg: coking, steelmaking, continuous casting equipment in the water vapor system and hydraulic system) 5. Need to dampen or eliminate the noise of the pipeline. (For example: pump import and export)

View Details