High and low temperature tanks are used to determine the suitability of products and materials for temperature cycling and for storage and use under low temperature conditions on the surface of the product. The equipment is placed in a test chamber with a room temperature test specimen in a temperature-compliant test chamber as specified in the relevant specifications. After the sample sample has reached temperature stability, it is exposed to the specified duration under these conditions. This test chamber uses forced air circulation. How to recover from high and low temperature boxes? 1. Test samples should be recovered under standard atmospheric conditions until thawed. 2. In order to remove water droplets, the sample may be shaken with a hand shake or air blown at room temperature for a short period of time. 3. When the test sample is recovered under standard atmospheric conditions, the recovery time should be sufficient to achieve temperature stability, at least Ih. When several samples are tested at the same time, and the recovery time of 1 h is sufficient, the longest recovery time is 2 h. All measurements must be completed before the end of this time. 4. If required by the relevant specifications, the test sample shall be energized or loaded during the recovery period and its performance shall be continuously measured. 5. When the standard atmospheric conditions are not suitable for the test sample, the relevant specifications may stipulate other recovery conditions. High pressure Gate Valve identified as class 900 and above according to the requirements of ASME B 16.34 which has two type of sealing way, flexible wedge disc and parallel slab disc which normally used in the high pressure main streaming pipeline or high pressure bypass water feeding pipeline etc. The main function is to cut off or cut on the medium controlled by electric actuator or handwheel. The sealing principle of pressrue seal gate valve is sealing surface tight off under pressure and they are widely applicated in petrochmical, thermal power plant. High Pressure Gate Valve,Carbon Steel Gate Valve,Power Station Gate Valve,Wedge Gate Valve Yongjia South Trading Co.,Ltd , https://www.n-lvalve.com