one. Prepare the tools required for installation:

Cleaning and tightening fasteners require a variety of specific tools, and standard installation equipment and good safety practices must always be used.

The following equipment needs to be prepared before installation:

>Calibrated torque wrench, hydraulic tightening wrench, or other tightening tools;

>Steel wire brush, brass brush is better;

>Helmet;

>Eye protection;

>Lubricant;

>Other factory-specified tools, etc.

two. Gasket installation steps:

1. Check and clean:

>Remove all foreign matter and debris from the gasket contact surface, various fasteners (bolts, studs), nuts and gaskets;

>Check fasteners, nuts and washers for burrs, cracks and other defects;

>Check the flange surface for warping deformation, radial scratches, deep tool damage, or other defects that affect the correct seating of the gasket;

>If a defective original is found, it should be replaced in time. If you have any questions about whether to replace it, you can contact the seal manufacturer in time.

2. Align the flange:

>Align the flange surface with the bolt hole;

>Any situation where a positive cannot be obtained should be promptly reported.

3. Install the gasket:

>Confirm that the gasket conforms to the specified dimensions and specified materials;

>Check the gasket to ensure there are no defects;

>Carefully insert the sealing gasket between the two flanges;

>Confirm that the gasket is centered between the flanges;

>Unless the gasket installation instructions require the use of adhesives or anti-adhesion agents, they cannot be used without permission;

>Align the flange faces to ensure that the gasket is not punctured or scratched.

4. Lubricate the stressed surface:

>Only specified or approved lubricants are allowed to be used in the lubrication stress area;

>Apply sufficient lubricant to the load-bearing surfaces of all threads, nuts and washers;

> Ensure that lubricant does not contaminate the flange surface or gasket surface.

5. Install and tighten the bolts:

>Always use the right tools

Use a calibrated torque wrench or other functionally controlled tightening tool;

>Consult the seal manufacturer’s technical department about torque requirements and regulations;

>When tightening the nut, follow the "Principle of Cross Symmetry";

To tighten the nuts follow these 5 steps:

Step 1: Initially tighten all the nuts manually. For larger nuts, use a small manual wrench to assist in tightening;

Step 2: Tighten each nut to approximately 30% of the full required torque;

Step 3: Tighten each nut roughly to 60% of the full required torque;

Step 4: Use the "Cross Symmetry Principle" again to tighten each nut to reach 100% of the required full wood torque.

Note: For large-diameter flanges, the above steps can be performed more times;

Step 5: Tighten all nuts one by one in a clockwise direction at least once to achieve the full required torque.

6. Tighten the bolts again:

>Note: The technical department of the seal manufacturer should be consulted for guidance and suggestions on re-tightening the bolts;

>Asbestos-free gaskets and gaskets containing rubber components that have been used at high temperatures must not be tightened again (unless otherwise specified);

> Fasteners that have received corrosion heat cycles need to be tightened again;

>Re-tightening should be performed at ambient temperature and atmospheric pressure.