Sampling Valve Working principle Laboratory Valve classification PVC Sampling Valve Product presentation

July 14, 2022

Sampling valves are valves used to obtain medium samples in pipelines or equipment for occasions where frequent chemical analysis of medium samples is required. It is mainly used for material sample collection in tank equipment or pipe, and can also be installed at the lowest point of tank equipment or pipe to discharge the residual liquid. Working principle: rotate the hand wheel counterclockwise and lift the valve stem and the sealing ring, and the valve opens; the hand wheel rotates clockwise, and the valve closes. Applicable temperature: -10℃ to 130℃ Valve body material: AISI 304 AISI 316L Seal material: PTFE / EPDM Connection mode: clamp, thread, welding, nut type. Product presentation: Sampling valve is a valve used to obtain medium samples in pipelines or equipment. In many cases where the chemical analysis of medium samples is often required, a special sampling valve is often used. According to the different working principle or performance of sampling, the PVC sampling valve is mainly divided into three types, including double opening valve, flange clamp valve and sampling valve with insulation jacket.

Product classification: Double opening valve Double-link opening valve is a more commonly used sampling valve, usually composed of two connected ball valves, which is characterized by sampling safety and stability. During the sampling process, first close the valve A near the equipment and the pipeline in the double opening valve, then open the valve B, let the medium flow into the space between the two valves, then close the valve B to open the valve A, and place the sampling vessel in the sampling port for the sampling medium.Flange splint valve The principle of the flange clamp valve is to seal through the vertebral body at the top of the valve stem and the cone hole of the valve seat, and use the hand wheel to separate the valve stem from the cone hole, so that the medium in the cone hole can flow into the external sampling vessel.

Sampling valve with thermal insulation jacket During the use of the sampling valve, if the need to use the insulation jacket, it should be noted that the valve should not be forcibly opened before the medium is completely melted, and Laboratory Valve must be opened after the crystallization dissolution in the valve, otherwise it is easy to cause safety accidents. When the sampling valve uses the insulation jacket, we should also pay attention to not forcibly opening the valve. If the valve cannot be opened, do not use the extended force arm, which will cause excessive force on the valve and lead to the loss of the valve core and the valve stem, or lead to the damage of the sampling parts, leading to safety risks.

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Mr. Zheng

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zheng@rmiplast.com

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