Diaphragm Back Pressure Relief Valve

Diaphragm Back Pressure Relief Valve

application

• Steam and water analysis system

• sampler

benefit

• Large area diaphragm design to maintain stable upstream pressure

feature

• Liquid receiving components in SS316 and Viton®

• The fixed adjustment pressure is 1.5 barg

• Fluid: Liquid

1、 Core application scenarios of back pressure relief valves

The document clearly indicates the two core application areas of the valve, both focusing on industrial systems that require high fluid pressure stability:

1. Steam&Water Analysis SystemsIn such systems, fluids (steam condensate, process water, etc.) need to maintain stable pressure to ensure the accuracy of analysis results (such as water quality indicators, component concentration detection). The back pressure relief valve can fix the upstream pressure to avoid abnormal sampling flow and temperature caused by pressure fluctuations, which may affect the reading accuracy of the analytical instrument. For example, in the water quality monitoring system of power plant boilers, it is necessary to stabilize the sampling pipeline pressure through this valve to ensure that equipment such as ion chromatographs and pH meters obtain continuous and uniform water samples.

2. Grab Sampling SystemsWhen manually sampling, operators need to obtain representative fluid samples (such as raw materials and finished products in chemical reaction vessels). The back pressure relief valve can prevent "flash evaporation" (loss of volatile components) or "gas blockage" (inability to extract the sample smoothly) caused by a sudden drop in pressure during sampling, ensuring that the composition and pressure of the sample are consistent with the fluid in the system.

2、 The Importance of Back Pressure Relief Valves: Why Not Ke or Missing?

Starting from the three core requirements of "safety, stability, and accuracy" in industrial production, their importance is reflected in the following three levels:

1. Ensure stable system pressure and avoid equipment damage

The document mentions that the valve adopts a "Large area diaphragm design", which can accurately maintain stable upstream pressure.

• If the system pressure is too high: the valve will automatically open to release pressure, preventing the pipeline, pump body, and analytical instrument from deforming or breaking due to overpressure (such as the stainless steel joint of the sampling pipeline leaking due to sudden pressure rise);

• If the system pressure is too low: the valve will close to maintain pressure, avoiding downstream equipment from not working properly due to insufficient pressure (such as the sample pump of the analytical instrument causing "idle" and damaging the seal due to insufficient pressure).

2. Ensure accurate sampling/analysis results and avoid production deviations

In industrial production, sampling and analysis results directly guide process adjustments (such as purity testing of chemical products, monitoring of corrosion in power plant water quality):

• If the pressure fluctuates, it may cause dissolved gases in the fluid to escape (such as oxygen and carbon dioxide in water), or the proportion of volatile components to change (such as component deviation in solvent based products), resulting in distorted analysis results;

• The "fixed regulating pressure of 1.5 barg" feature of the valve in the document ensures consistent pressure environment for each sampling/analysis, eliminates interference from pressure variables on the results, and guarantees data repeatability and reliability.

3. Improve operational safety and reduce personnel risks

Industrial fluids, such as steam and chemical raw materials, often have characteristics such as high temperature, high pressure, and corrosiveness

• If there is a lack of back pressure relief valves, fluid jets may occur during manual sampling due to sudden pressure changes, causing burns and chemical injuries to operators;

• The fluid contacting components of the valve are SS316 stainless steel and Viton ® Wetted parts in SS316 and Viton ®）” Characteristics: It can also resist the erosion of corrosive fluids (such as acidic and alkaline solutions), avoiding the risk of leakage caused by damage to the valve body.

3、 The support of key technical characteristics for "application&importance"

The product features mentioned in the document further enhance their application value and importance, which can be summarized in the following table:

summary

The back pressure relief valve is not a simple "pressure relief component", but the "core control unit" for pressure stability in industrial sampling/analysis systems. Through precise pressure regulation, it not only ensures equipment safety and personnel safety, but also ensures the accuracy of sampling and analysis results, ultimately providing key support for the "compliance and efficiency" of industrial production. Especially in pressure sensitive steam, water analysis, and manual sampling scenarios, it is an indispensable core component.

Diaphragm Back Pressure Relief Valve