1. Product Overview

Pressure regulator valve is a type of valve used fortoair circuitsystematicpressureTraffic needsprecise controlandadjustThe componentsIn chromatographic analysisprocessAmong them, its main function isEnsure the flow pressure of the pneumatic systemstable；controllable、Reliable,So as to ensure chromatographyThe analysis results are qualitatively accurate and quantitatively precise with high repeatabilitysexgood.It is an ideal choice for high-quality, high-performance, and high-quality instruments.

2. working principle

2.1 Core Function: The valve adopts an alloy diaphragm structure and automatically compensates for fluctuations in inlet pressure through an internal mechanical feedback system, maintaining the output pressure at the user set value.

2.2 Working process:

settingSet the inlet pressure to0.4MPa， The output pressure can be set to the target value (e.g. 0.2 MPa) by adjusting the knob.

When the inlet pressure rises：P2 increases the upward movement of the diaphragm, and the small spring pushes the top rod upward to reduce the opening of the valve core, thereby offsetting the pressure increase and stabilizing the output pressure at 0.2 MPa

When the inlet pressure drops：P2 decreases, and the large spring with P1 greater than P2 causes the diaphragm to move downwards, pushing the rod downwards and increasing the opening of the valve core, thereby offsetting the pressure loss and stabilizing the output pressure at 0.2 MPa(Figure 1)

Figure 1

This is the working principle of the steady flow valve，No matter how the inlet pressure changes, the output pressure can remain highly stable.

3. Technical parameters and performance

3.1 Valve body debugging and sealing test:

Closing test: At low voltage respectively（Set at 0.1MPa and high pressure (0.6MPa).

Sealing testUsing the pressure holding bubble method, test duration15 minutes, ensure no leakage.

3.2 Temperature characteristics:

The product undergoes strict temperature cycling testing before leaving the factory (heating up to60 ℃), springCreep stress releaseContinuous recording6-day pressure temperature variation curve. The pressure error variation is 2.15 × 10 ⁻⁵ MPa/℃, and the average error variation is 1.875 × 10 ⁻⁵ MPa/℃, indicating stable pressure performanceexcellent.(Figure 2)

Figure 2

3.3 Cleanliness:

Adopting scientific cleaning and baking processes to ensure product cleanliness meets chromatographic requirements.

As shown in the attached diagram(Figure 3)The valve body has no impurities precipitated during testing.

Figure 3

4. Installation and usage methods

4.1 Interface Connection:

Valve body identification:'I' is for import, 'O' is for export (dual outlet design, one of which can be connected to a pressure gauge or sealed with a plug).

Interface thread:M8 × 1, applicable pipe diameters: 1.6mm, 2mm, 3mm.

4.2 Pressure regulation:

clockwiseRotate the adjustment knob to output pressureincrease.

counterclockwiseRotate the adjustment knob to output pressurereduce.

4.3 Pressure conditions:

The input pressure mustgreater thanOutput pressure at least0.05MPaTo ensure the normal operation and optimal performance of the regulator valve.

4.4 Gas source requirements:

The input gas source should be ensuredPure and dryTo prevent oil stains, dust, and other mechanical impurities from entering the valve body, in order to avoid affecting itPerformance of stabilizing valve.

5. Applicable Environment：

This product is suitable for applications that require high pressure control accuracy, including: petrochemical industry、instrumentation and meters、Gas source generator、General laboratory, etc.

This product has reliable performance and can replace similar imported products.