1. Product specifications

Model: D7-2.5

Material: High wear-resistant rubber (optional NBR, EPDM, FKM, HNBR, etc.)

Color: Default black (customizable according to customer needs)

Size: Standard D7-2.5 specification (supports non-standard customization)

Hardness range: 55-75 Shore A

Working temperature: -30℃ ~ 120℃ (different materials have different temperature resistance ranges)

Applicable media: oil, water, emulsion, weak acid and alkali liquids, etc.

Pressure resistance: can withstand working pressure of 0-10MPa (depending on the material and working conditions)

2. Product features

1. High wear resistance: using special wear-resistant rubber formula, can withstand long-term high-frequency friction and extend service life.

2. Excellent sealing effect: High elastic rubber material can fit tightly with the screw pump to prevent leakage and improve pumping efficiency.

3. Strong corrosion resistance: Suitable for various chemical media, strong oil resistance, acid and alkali resistance, and adaptable to complex working conditions.

4. High elastic buffer: Can effectively absorb vibration and impact, reduce mechanical loss, and reduce operating noise.

5. Adapt to a variety of working conditions: Can be used in complex environments such as high temperature, high pressure, and highly corrosive liquids.

6. Customized production: Customized services of different specifications, materials, and hardness can be provided according to customer needs.

3. Product Use

Screw rubber sleeve D7-2.5 is suitable for various screw pump systems and is widely used in the following industries and scenarios:

Petrochemical: used to transport high-viscosity oils, lubricants and oil-water mixtures containing solid particles.

Food processing: suitable for transporting food-grade liquids such as juice, dairy products, sauces, syrups, etc. (food-grade rubber can be selected).

Pharmaceutical industry: used to transport high-viscosity agents, disinfectants, syrups and other fluids during pharmaceutical production.

Environmental protection industry: used in sewage treatment equipment to transport sludge, flocculants and other media.

Papermaking and printing: used for the transportation of inks, slurries, and coating liquids to improve production efficiency.

Mining and construction: transport high-viscosity media such as mud, ore pulp, and concrete additives.

IV. Product quality inspection

D7-2.5 screw sleeve strictly implements the quality management system during the production process, and each batch of products must undergo the following tests:

Dimensional inspection: Ensure that product specifications meet design requirements and ensure assembly matching. •

Hardness test: Test the elasticity and durability of rubber to ensure adaptation to different working conditions.

Temperature resistance test: Simulate high and low temperature environments to test the stability of rubber materials.

Corrosion resistance test: Test for acid, alkali, oil and other media to ensure long-term use without deformation and aging.

Tensile strength test: Test the toughness and tear resistance of rubber materials to ensure durability.

Pressure test: Simulate the actual working pressure environment to ensure that the product still has good sealing performance under high pressure conditions.

V. Product packaging and transportation

1. Packaging method: Single piece packaging: Use plastic bags or bubble film packaging to prevent scratches and deformation.

Bulk packaging: Cartons or wooden boxes are used for packaging, which are moisture-proof and dust-proof, and suitable for long-distance transportation.

Product logos are affixed to indicate specifications, quantity, material and production date for customer acceptance.

2. Transportation method:

Small batch orders: Fast delivery by express (DHL, UPS, FedEx, EMS).

Large batch orders: Ship by sea, air or land to ensure safe arrival at the customer's designated location.

3. Delivery time:

Standard products are in sufficient inventory and can usually be shipped within 3-7 working days.

The production cycle of customized products is 7-15 working days, and the specific delivery period is determined according to the order quantity.

VI. Product precautions

1. Pre-installation inspection: Ensure that there are no cracks, deformations or other damage on the surface of the rubber sleeve. Clean the installation area to avoid impurities affecting the sealing effect.

2. During installation: Avoid using excessive force or sharp tools to avoid scratching the rubber surface. Ensure that the rubber sleeve matches the screw pump to avoid leakage or abnormal operation due to size mismatch.

3. Use and maintenance: Regularly check the wear of the rubber sleeve. If it is found to be aging, cracking or severely worn, it should be replaced in time. Avoid being in extreme temperatures or corrosive environments for a long time to extend the service life.

4. Storage requirements: Store in a cool, dry and ventilated environment, avoid direct sunlight and high temperature and humidity. Avoid direct contact with strong acids, strong alkalis, and organic solvents to prevent material aging.