Product Overview

Our fabric reinforced U-cup seal is specifically designed for plunger and piston sealing applications in high-pressure cleaning equipment and pressure washer pumps. The fabric reinforcement provides excellent wear resistance and dimensional stability, ensuring long service life even under demanding conditions. Made from high-quality NBR (Nitrile Butadiene Rubber) with integrated fabric reinforcement, this seal offers superior durability and sealing performance.

Also known as Fabric Reinforced U-Seal, Cloth Inserted U-Cup, U-Cup Packing, U-Packing, Pump U-Seal, Plunger Seal, or U-fabric laminated rubber seal, this versatile sealing component is widely used in plunger pump assemblies and is a standard replacement part for most pressure washer pumps and cleaning equipment.

In the industry, this product is commonly referred to by various brand-specific and generic names. It is known as NEOFAB or fabric reinforced packing in some markets, as RU6, RU300 or U-Cup Balsele in European seal catalogs, and as U-fabric laminated rubber seal in industrial standards. Some manufacturers also call it cloth inserted gasket or rubber fabric seal. It serves the same function across all brands and models, ensuring reliable sealing between pump components under high-pressure conditions.

Core Product Advantages

Fabric Reinforced Construction: This premium fabric reinforced U-cup seal features an integrated fabric layer that provides enhanced tear resistance and dimensional stability, significantly extending seal service life.
U-Shaped Lip Design: The lip profile ensures effective sealing under pressure, providing reliable leak protection even in low-pressure conditions.
Excellent Wear Resistance: Designed to withstand high-cycle plunger movement and abrasive conditions, with outstanding extrusion reliability.
Broad Compatibility: Compatible with most pressure washer plunger pumps and cleaning equipment, including household, commercial and industrial models.
Factory Direct Supply: Strictly produced in accordance with industrial standards, cost-effective wholesale pricing, supporting OEM customization and bulk spot supply.

Standard Size Range

We stock a wide range of fabric reinforced U-cup seals for pressure washers. Most standard sizes listed below are in stock and ready for immediate shipment (ID × OD × T):

12-13mm series: 12×17×4.5mm / 12×20×4mm / 13×20×4mm
14-15mm series: 14×22×4mm / 14×22×5.5mm / 15×22×5mm / 15×24×6mm
16mm series: 16×26×5mm / 16×26×6mm
18mm series: 18×26×5.5mm / 18×28×6mm / 18×30×6mm
20mm series: 20×28×5.5mm / 20×28×6mm / 20×30×6mm
22mm series: 22×30×6mm / 22×32×6mm
25mm series: 25×34×6mm / 25×35×6mm
28mm series: 28×36×6mm / 28×38×6mm
30-32mm series: 30×38×6mm / 32×40×5.5mm

All sizes are fabric reinforced cloth inserted type.

Need a size not listed above? We support custom manufacturing based on your drawings and samples. Please contact us for availability and lead time.

Application Scope

This fabric reinforced U-cup seal is widely used in:

Pressure washer plunger pumps (household, commercial and industrial)
High-pressure cleaning equipment
Hydraulic cylinders and piston rods
Industrial pumps and compressors
Water systems and hydraulic oil systems

Quality & Standards

Our fabric reinforced U-cup seals are manufactured in compliance with ISO 9001 quality management standards and meet international industrial requirements for sealing components. Each seal undergoes strict dimensional inspection and material testing before shipment to ensure consistent quality and reliable performance.

Frequently Asked Questions

Q: What is the temperature range of this U-cup seal?
A: The operating temperature range is -20°C to 100°C, suitable for most pressure washer and cleaning applications.

Q: What is the difference between a U-cup seal and a standard O-ring?
A: U-cup seals feature a lip design that provides better sealing under pressure and higher wear resistance compared to standard O-rings, making them ideal for plunger pump applications.

Q: Is this the same as a fabric reinforced seal or cloth inserted seal?
A: Yes, this is commonly referred to as a fabric reinforced seal, cloth inserted U-cup, U-packing, or U-fabric laminated rubber seal in the industry. It serves the same function of providing durable sealing in high-pressure plunger pump applications.

Q: How long does delivery take?
A: Most standard sizes are in stock and ship within 1-3 business days. Custom sizes require 7-15 days.

Q: Do you offer wholesale pricing?
A: Yes, we offer competitive wholesale prices for bulk orders. Please contact us for a quote.

Related Products

Explore our complete range of sealing solutions for pressure washers and cleaning equipment:

Custom Service

In addition to the complete standard sizes in stock, we also support non-standard size customization according to customer drawings and samples. Whether it is special inner diameter, outer diameter or thickness specifications, we can customize production to meet the personalized sealing needs of different cleaning equipment models.

Contact us today to get the best factory-direct price and free technical consultation.

Hard PU Plunger Rod Main Seals

Fabric Reinforced U-Cup Seal for Pressure Washer