1. Overview

This procedure is intended to provide process guidelines for proper installation of Lee Check Valve, 832 Series, Forward, Insert product. Section 2 provides an overview of the hole requirements. Section 3 contains the installation procedure. Section 4 contains a diagram of proper orientation and position of the product with respect to the installation hole and installation tool.

Compliance with this installation procedure will ensure optimal product performance. Please contact your local Lee Company Sales Representative for questions concerning installation of Lee Company products.

2. Installation Hole Requirements

The Lee Check Valve, 832 Series, Forward, Insert product is purposely designed to perform well under adverse conditions. Therefore, the installation hole specifications outlined in this section should be followed precisely to ensure proper function of the product's expansion sealing features. Installation forces and pressure ratings are based on installations into aluminum housings or manifolds.

Installation hole specifications as found on Lee Installation Drawing 1INST033385S (Appendix B) will ensure proper operation of the Lee Check Valve, 832 Series, Forward, Insert product. The hole should be clean, dry, and free of burrs. Surface finish should not exceed 1.6µm (Ra) with no longitudinal surface defects. Surface finish requirements must be given special attention. The expansion section of the Lee Check Valve, 832 Series, Forward, Insert product seals and retains the product in the hole. A smooth machined surface where the product interacts with the hole is needed to seal and retain the valve properly.

The Lee Company does not recommend the use of coatings or surface treatments in the area of the installation hole where the product is to be installed. These may reduce product retention.

3. Installation

Installation Overview

All Lee Check Valve, 832 Series, Forward, Insert products use a pin to expand a grooved section of the insert's body into the housing wall to affect a seal and retain the component. The pin, which has been pre-installed, is driven into the body. The insert is pre-lubricated for proper installation. Do not clean prior to installation.

Diagram: Installation Process

A diagram illustrates the installation process. It shows an 'Installation Tool' positioned above an 'Installation Hole' containing the 'Forward Valve' insert. A 'Pin' within the insert is visible. The diagram depicts the 'Installation Force' being applied by the tool to drive the pin. The numbered steps describe the sequence:

1. When the installation tool is retracted, the pin should be flush to within 0.25 mm above flush of the insert body.
2. The installation tool (P/N CCRT0900150S), aligned with the installation hole, approaches the hole and contacts the back of the pre-installed pin. The tool drives the pin into the Lee Check Valve, 832 Series, Forward, Insert product body with a force of 6,227 Newtons maximum. Using friction and penetration, the lands bite into the housing material.
3. The Lee Check Valve, 832 Series, Forward, Insert product is inserted into the installation hole with the pin end up as shown.

3.1 Installation Equipment

The Lee Check Valve, 832 Series, Forward, Insert product has been designed to be installed using pneumatic, hydraulic, or electric servo-press equipment. An electric servo-press system is recommended for high volume production as it provides detailed feedback for better in-process controls of the installation process. The housing in which the component is to be installed should be held stationary on a solid surface. The Lee Check Valve, 832 Series, Forward, Insert product is expanded by the insertion of the pre-installed and lubricated expansion pin using an installation tool under load. Adjust the press stroke to eliminate excess over travel as this may damage the Lee Check Valve, 832 Series, Forward, Insert product. Adjust the press supply pressure to limit the maximum force to 6,672 Newtons.

Insertion should be done using Lee Installation Tool P/N CCRT0900150S (see Appendix C). The tool and installation hole need to be concentric within 0.03 mm as shown in Diagram of Factory Installation Appendix A. See Appendix D for further information about the recommended electric servo-press system from Promess, Inc.

3.2 Standard Factory Installation (see Appendix A)

1. Firmly support the housing or manifold in which the valve is to be installed.
2. Insert Lee Check Valve, 832 Series, Forward, Insert product into the installation hole, pin end up, until it is seated on the shoulder of the installation hole.
3. The installation force should be 6,227 Newtons maximum using Lee Installation Tool P/N CCRT0900150S. The tool can approach the product at a rate of 20-35 mm/sec. The maximum speed of the tool during installation should be limited to 3 mm/sec.
4. Inspect the Lee Check Valve, 832 Series, Forward, Insert product for proper installation by measuring the depth of the pin relative to the valve body. Installation is complete when the exposed ends (surfaces A and B) are flush to within 0.25mm above flush of each other as shown in Appendix A.
5. Retract the tool and follow the same procedure for additional installations.

Factory Best Practices:

1. Examine the condition of the Installation Tool at appropriate intervals and replace if damaged or chipped.
2. Clean feed bowls once per day.
3. Turn off vibratory feed bowl when the assembly station is idle, or if the feed rail is full of parts.
4. Use the minimum vibration setting to advance valves in the feed bowl.
5. If the check valve is blown into the assembly area from the feed rail, minimize the air pressure at which the check valve is blown into the assembly area to prevent possible damage.