Complete Guide to Flange Butterfly Valve Installation Methods

Complete Guide to Flange Butterfly Valve Installation Methods

Connection methods of flange butterfly valves

1. Flange connection:

- Definition: The flange butterfly valve fixes the valve to the pipeline through two flanges and bolts. There are multiple bolt holes on the flange for alignment and tightening with the pipeline flange.

- Advantages: easy installation, good sealing performance, easy disassembly and maintenance.

- Scope of application: suitable for medium and low pressure pipeline systems, especially for occasions that require frequent disassembly and maintenance.

Installation Guide for Flange Butterfly Valve

1. Preparation:
- Check the valve: Before installation, carefully check whether the model and specifications of the valve meet the design requirements to ensure that the valve is free of damage and impurities.
- Clean the pipeline: Clean the debris and rust in the pipeline to ensure that the inner wall of the pipeline is smooth and free of residue.
- Prepare tools: Prepare the required tools, such as wrenches, screwdrivers, sealing gaskets, etc.

2. Installation steps:
- Position the valve: Place the flange butterfly valve in the predetermined position to ensure that the valve is aligned with the center of the pipeline.
- Align the flange: Align the valve flange with the pipeline flange to ensure that the bolt holes of the two are completely aligned.
- Install the sealing gasket: Install a suitable sealing gasket on the flange contact surface to ensure sealing performance.
- Install the bolts: Pass the bolts through the flange holes and tighten the nuts evenly to ensure that the contact surface between the flanges is flat and without gaps.
- Check the seal: Gently rotate the valve handle to check whether the valve rotates freely without sticking, and check whether there is leakage at the flange connection.

3. Notes:
- Correct direction: Make sure the flow direction mark of the valve is consistent with the direction of the pipeline fluid to avoid reverse installation.
- Even tightening: When tightening the bolts, they should be tightened evenly one by one in diagonal order to prevent leakage caused by uneven force on the flange.
- Reserve space: During the installation process, ensure that there is enough space around the valve for future maintenance and repair.
- Avoid over-tightening: Do not use excessive force when tightening the bolts to avoid damaging the flange or sealing gasket.
- Regular inspection: After installation, regularly check the operation of the valve to detect and deal with potential problems in a timely manner.

As an efficient and reliable fluid control device, flange butterfly valve plays an important role in many industrial fields. Correctly selecting the connection method and following the standard installation guidelines can ensure the normal operation and long service life of the valve. I hope this article can provide users with valuable references and help everyone successfully complete the installation and use of flange butterfly valves.