H91X card sleeve one-way valve stainless steel double card sleeve check valve

H91X card sleeve one-way valve product introduction

H91X card sleeve one-way valve (also known as check valve) is an automatic valve installed through a card sleeve connection, mainly used to prevent the backflow of pipeline media and ensure the safe operation of the system. Its compact structure, reliable sealing, and suitability for various working conditions are widely used in industries such as petroleum, chemical, power, and instrumentation.

Working principle and characteristics of H91X card sleeve one-way valve

1. Working principle

The valve is equipped with a spring and baffle structure inside: when the medium flows forward, the thrust overcomes the spring force to push open the baffle, and the valve opens; When the medium flows in the opposite direction, the baffle is pressed tightly against the cover under the action of the spring and reverse pressure, and the valve closes, achieving one-way flow control.

2. Core Features

• Automatic opening and closingNo external drive required, relying on medium pressure to act on its own and respond quickly.

• compact structureIntegral valve body design, occupying small space, suitable for installation in narrow pipelines.

• Reliable sealingThe combination of card sleeve connection and multi material sealing surface ensures no leakage under high pressure and high temperature conditions.

Application scenarios and selection suggestions

1. Typical application areas

• industrial pipelinePump outlets or container inlets and outlets in petroleum, chemical, and thermal power plants to prevent medium backflow.

• Instrument systemPaired with pressure gauges, flow meters, etc., it protects precision equipment from reverse pressure shocks.

• Special environmentHigh temperature and high pressure pipelines (such as fertilizer plants, cement plants) or transportation of corrosive media (using stainless steel materials).

2. Selection precautions

Pressure matchingSelect the corresponding PN level based on the system working pressure to avoid overpressure use (such as prioritizing the PN320 model for high-pressure systems).

Temperature and medium compatibilityHigh temperature or corrosive environments require the use of stainless steel valve bodies and metal hard seals.

1. Installation steps

The installation of H91X card sleeve check valve needs to be strictly carried out according to standard operating procedures to ensure the sealing and functionality of the valve. The following are the specific installation steps:

the first stepInsert the pipe into the joint, ensuring that the end of the pipe reaches the bottom of the joint, and tighten the sleeve nut with your fingers.

Step twoMake a mark at the 6-point position on the sleeve nut.

Step threeFix the joint body with a wrench, rotate the sleeve nut one and a quarter turns, and then rotate the mark 540 degrees to the 9 o'clock position.

Step 4Through threaded mechanical propulsion, the forward movement of the sleeve nut pushes the rear sleeve forward, while the rear sleeve pushes the front sleeve forward.

Step 5The joint body presses the front sleeve inward, and the front sleeve eliminates the tolerance between its inner diameter and the outer diameter of the pipe.

Step SixAs the rear sleeve advances, the front sleeve moves forward and inward, and the rear end lifts up, forming a seal with the inclined surface of the joint body.

Step SevenAs the deformation of the pipe increases and the contact surface between the inclined surface of the body and the front sleeve increases, the greater resistance forces the rear sleeve to move inward, thereby forming a second firm support on the pipe.

During the installation process, special attention should be paid to the direction of medium flow. The normal flow direction of the medium should be consistent with the direction indicated by the arrow on the valve body, otherwise it will cut off the normal flow of the medium. In addition, a visual inspection and strength and tightness performance test must be conducted before valve installation, and it can only be used after passing the test.