supermarket refrigerated showcase » article > display refrigerator > The role of valves and meters in commercial refrigeration
The role of valves and meters in commercial refrigeration
the role of valves and meters in
commercial refrigeration>
installation of valves and measuring instruments
all kinds of valves (except safety valves with lead seals) need to be disassembled and cleaned before installation to remove oil and rust. The valve is cleaned with kerosene for sealing test. The cleaned valve is opened and closed 4 to 5 times before oil injection, and then kerosene is injected. After 2 hours, no leakage is considered qualified. If the sealing test fails, for valves with valve lines (such as check valves, solenoid valves, electric valves, etc.), the sealing lines should be ground. For valves sealed with packing, the packing should be replaced and re-tested until it is qualified. Before the valve is installed, a strength test and a tightness test should be carried out, and those who fail to pass shall not be installed. For the valves on the lubricating oil pipeline and refrigerant pipeline, air tightness tests shall be carried out one by one. When installing the valve, first pay attention to the flow direction of commercial refrigeration refrigerant, and do not install the valve backwards. Secondly, the height of valve installation should be convenient for operation and maintenance. The handle of the valve should be as upward as possible, and downward is prohibited. For valves installed in rows, the stems should be on the same plane as possible. For all measuring instruments, special products must be used according to design requirements. The pressure measuring instrument must be calibrated with a standard pressure gauge, and the temperature measuring instrument must be calibrated with a standard thermometer and recorded. All instruments should be installed in a place with good lighting, easy observation, and not obstructing operation and maintenance. The instrument installed outdoors should be protected from the sun and rain. The pressure relay and temperature relay should be installed in a place free from vibration.
the above articles are from refrigerated showcase commercial refrigeration, supermarket commercial refrigeration, for details, please visit: www.ihdjx.com
free order hotline: +86 18019567573
keywords:
Ranking of similar articles
- Dragon fruit reveals ark makes pitaya ornamental fruit
- May 2011 refrigerated showcase Qingyuan Tour
- walk-in cooler disassembly and maintenance method
- Represent the frozen watermelon fruit for storage
- 2012 take care of the old man from the supermarket refrigerated showcase
- Refrigerated showcase major sales walk - cooler in class
- Refrigerated showcase walk - in cooler energy-saving progresses steadily
- Refrigerated showcase walk - in cooler cleaner which aspects should be paid attention to
- Small convenience store owner should show how to choose the convenience stores ltd. refrigeration
- refrigerated showcase Tip: Which fruits are not suitable for placing in the fruit refrigerated showcase
- 2013 refrigerated showcase ltd. refrigeration lunar New Year holiday notice
- The structure and working principle of computer-based supermarket refrigerated showcase
- Commercial refrigeration evaporator embedment and production (6)
- Air-conditioner noise?
- The rapid growth of the supermarket walk-in cooler market in refrigeration equipment
- walk-in cooler refrigeration failure and maintenance method (5)
- The air-conditioner doesn't automatically melt frost failure analysis
- display cases Refrigeration failures and maintenance methods (9)
- The general principle of design and layout of display cooler refrigeration system
- Walk-in cooler secondary failure unit refrigeration difference analysis (2)
Latest news articles
- May 2011 refrigerated showcase Qingyuan Tour
- refrigerated showcase Refrigeration Equipment Co., Ltd. growth process
- Refrigerated showcase major sales walk - cooler in class
- Refrigerated showcase display cooler written commercial display cooler legend
- Refrigerated showcase walk - in cooler energy-saving progresses steadily
- 2012 take care of the old man from the supermarket refrigerated showcase
- refrigerated showcase Tip: Which fruits are not suitable for placing in the fruit refrigerated showcase
- Dragon fruit reveals ark makes pitaya ornamental fruit
- Watermelon fresh-keeping refrigerator can better preserve the nutrients of watermelon
- Represent the frozen watermelon fruit for storage
- Hairy crabs freezer frozen taste more fresh
- How hairy crabs fresh refrigerated showcase display cooler tell you
- Large supermarket display ark how to choose the right goods
- Small convenience store owner should show how to choose the convenience stores ltd. refrigeration
- Refrigerated showcase ltd. refrigeration has been a leader in innovation and energy saving
- In September 2012, refrigerated showcase west chung
- Refrigerated showcase walk - in cooler cleaner which aspects should be paid attention to
- Correctly use refrigerated showcase supermarket refrigerated showcase the matters needing attention
- , a refrigerated display showcase meat cooler features of the product
- Refrigerated showcase walk - in the cooler is icy