Two-Station Seal Leakage Tester for Spin-On Filter

Equipped with a dual-station structure, this Two-Station Seal Leakage Tester for Spin-On Filters offered by leading China manufcaturer Pulan simultaneously with a production capacity of up to 600 pieces/hour. The threaded connectors and sealing rings can be quickly replaced according to different filter diameters and thread specifications, providing excellent adaptability for various filter models.

The water immersion testing method keeps the main machine components away from direct contact with water, preventing rust and ensuring long-term stable operation.

What Is a Two-Station Seal Leakage Tester for Spin-On Filters?

The Two-Station Seal Leakage Tester for Spin-On Filters is an automated testing machine designed to check the sealing performance of spin-on filters. It uses the principle that compressed air escaping into water will generate visible bubbles, allowing operators to quickly and accurately determine whether a filter has leakage.

The machine features an integrated electromechanical design, consisting of a control panel, threaded connection heads, air inlet system, main cylinder, water lifting cylinder, and water tank.

During operation, the filter is screwed onto the connection head and sealed by the sealing ring. Compressed air is then injected into the filter while the water tank rises to completely immerse the filter. Any leakage will create continuous bubbles in the water, indicating an unqualified product.

With two testing stations working simultaneously, the machine provides high efficiency and reliable inspection results for filter manufacturers.

Application & Machine Structure

Application

Designed for batch sealing inspection of spin-on filters.

Applicable filter height: ≤350mm

Main Components

Working Principle & Testing Process

Working Principle

The machine uses the air bubble detection method. After the filter is sealed and filled with compressed air, it is completely immersed in water.

If the filter has good sealing performance, no bubbles will appear. If leakage exists, escaping air will generate continuous bubbles in the water, allowing defective filters to be identified immediately.

Testing Procedure

1. Preparation: Replace the sealing ring and connection head according to filter diameter and thread specifications. Fill the water tank with clean water and set testing time and pressure.
2. Loading: Place the filter onto the connection head and press the foot switch.
3. Thread Tightening: The motor rotates forward to tighten the filter onto the connection head.
4. Sealing: The main cylinder retracts and presses the filter tightly against the sealing ring.
5. Air Pressurization: Compressed air enters the filter at the preset pressure (0-0.8MPa).
6. Water Immersion: The water lifting cylinder raises the water tank and completely immerses the filter.
7. Leak Detection: Observe the water surface. Bubbles indicate leakage, while no bubbles indicate a qualified seal.
8. Reset: After testing, the water tank lowers, the cylinder separates the filter, and the motor reverses to remove the filter.
9. Continuous Operation: The next filter enters automatically for continuous testing.

Key Advantages

1. Dual-Station Testing for Efficient Production

Two filters can be tested simultaneously, achieving a production capacity of 600 pieces/hour. It is suitable for medium-volume production lines and inspection stations requiring cost-effective solutions.

2. Water Pressure Testing Without Machine Water Exposure

The water tank moves upward to immerse the filter while the main machine remains isolated from water, reducing corrosion risk and improving equipment durability.

3. Bubble Detection Method with Clear Results

Leakage is directly identified by observing bubbles in water, providing a simple, visual, and reliable inspection method.

4. Quick Replacement of Connectors and Sealing Rings

Threaded connectors and sealing rings can be replaced according to different filter sizes, allowing flexible adaptation to various filter models.

5. Adjustable Testing Time and Pressure

The testing duration can be controlled by the time relay, while the pressure adjustment valve allows testing pressure adjustment from 0-0.8MPa.

6. Automated Inspection Process

Filter tightening, sealing, pressurization, immersion, inspection, reset, and removal are automatically completed. Operators only need to load and unload filters.

7. Multiple Models Available

The same series also includes the PLJL-4B Four-Station Model, allowing customers to select the suitable configuration according to production capacity requirements.

8. CE Certified Safety Design

Multiple models have passed CE certification and are equipped with emergency stop switches, safety protection systems, and grounding protection.

Technical Specifications

Installation Requirements

1. Install the machine on a flat, clean, and well-ventilated floor away from high temperatures and dust.
2. Keep at least 1 meter clearance on the sides and rear, and at least 1.5 meters in front.
3. Use a forklift above 1 ton for transportation.
4. Fix the machine securely and adjust the level.
5. Connect to 380V/50Hz power supply with independent grounding.
6. Required air pressure: 0.6MPa.
7. Check cables and emergency stop buttons before operation.
8. Use clean water in the tank. Do not use muddy water or water containing impurities.

FAQ

Q1: What should I do if the filter cannot be properly sealed with the sealing ring?

A: There are two possible causes:

① The sealing ring is damaged → Replace it with a new sealing ring. ② The sealing ring size does not match the filter diameter → Replace it with a suitable size.

Q2: What if no bubbles appear during testing but the filter still has a small leakage?

A: Increase the testing pressure within the range of 0-0.8MPa or extend the testing time through the time relay. Small leaks will become easier to detect under higher pressure or longer testing duration.

Q3: Why cannot the filter be screwed onto the connector?

A: Possible reasons:

① Filter thread does not match the connector thread → Replace with the correct connector. ② Motor rotation direction is incorrect → Adjust the power phase sequence.

Q4: How should I choose between two-station and four-station models?

A: The PLJL-2B Two-Station Model provides a capacity of 600 pcs/hour and is suitable for medium-volume production or supporting inspection stations.

The PLJL-4B Four-Station Model provides 800-1000 pcs/hour and is more suitable for large-scale production requirements.

Purchasing Information

1. The Two-Station Seal Leakage Tester for Spin-On Filters is designed for batch sealing inspection of spin-on filters.
2. Free sample testing is available. Customers can send their filters for trial testing, and tested samples will be returned for verification.
3. Discount prices are available for bulk orders. Please contact our sales team for delivery schedules.
4. Customized solutions are available, including additional stations (such as PLJL-4B four-station model) and special filter specifications.
5. English and Chinese manuals, electrical drawings, and pneumatic component lists are supplied with the machine.
6. As a professional filter leak testing equipment manufacturer and exporter, Pulan provides factory-direct pricing, one-year warranty, and long-term supply of spare parts including sealing rings, connection heads, and cylinder sealing components.
7. Contact us for quotation or factory visit arrangements.