20 Important Precautions for Valve Installation

20 Important Precautions for Valve Installation

As a China high pressure dual plate check valve manufacturer, we know that proper valve installation is essential for ensuring product performance, safety, and durability. Below are 20 critical tips for installing valves correctly:

1. Clean and Check Before Installation

Ensure the valve cavity and sealing surfaces are clean. Tighten all connecting bolts evenly and check whether the packing is compressed properly.

2. Keep the Valve Closed During Installation

Valves should be in the closed position when installed.

3. Vertical Installation for Large Valves

Large gate valves and pneumatic control valves should be installed vertically to prevent the valve core from leaning due to its weight, which can cause leakage.

4. Follow a Standard Installation Process

Always adhere to a correct and standardized installation procedure to ensure consistency and reliability.

5. Ensure Proper Working Position

Install the valve in the allowed working position, ensuring easy maintenance and operation.

6. Match Flow Direction with Valve Markings

For globe valves, the flow direction of the medium should match the arrow on the valve body. For valves requiring strict closure, reverse installation can help achieve a tighter seal.

7. Slightly Open the Valve When Tightening Bolts

When tightening gland bolts, keep the valve slightly open to avoid damaging the sealing surface.

8. Perform Cold Tests on Cryogenic Valves

Cryogenic valves should be tested in a cold state before installation to ensure smooth operation without jamming.

9. Install Liquid Valves at an Angle

Install liquid valves with the stem inclined at a 10° angle from horizontal to prevent leakage along the stem.

10. Pre-tighten Flanges for Air Separation Towers

For large air separation towers, pre-tighten valve flanges once at low temperature after cooling to prevent leaks during operation.

11. Do Not Use the Valve Stem as Support

Never climb on or use the valve stem as a scaffold during installation.

12. Re-test After Positioning

Once all valves are installed, perform another open-close test to confirm smooth operation.

13. Position Valves Before Pipeline Installation

Valves should be fixed before pipe installation. Avoid forcing pipe alignment to prevent residual stress.

14. Handle Non-metallic Valves Carefully

Non-metallic valves can be brittle or low in strength. Avoid excessive force and sudden impacts during operation.

15. Prevent Damage During Handling

Avoid bumps, impacts, and scratches when transporting and installing valves.

16. Avoid Over-tightening Packing on New Valves

For new valves, do not compress the packing too tightly; tighten just enough to prevent leakage.

17. Confirm Standards and Requirements

Ensure the valve meets design requirements and relevant industry standards before installation.

18. Clean the Pipeline Before Installation

Remove debris such as iron filings from the pipeline to prevent foreign objects from damaging the valve seat.

19. Re-tighten High-Temperature Valves After Heating

Install high-temperature valves at normal temperature. After the system heats up, retighten bolts to avoid leakage.

20. Confirm Flow Direction and Orientation

Before installation, verify the medium flow direction, installation position, and handwheel orientation.