Heavy-Duty 705-17-04440 Back Up Ring | to Prevent Seal Extrusion & Damage

Product Description 

The 705-17-04440 is a professional-grade back-up ring engineered to significantly extend the service life and reliability of O-ring seals in high-pressure hydraulic systems. Manufactured from high-quality NBR and precision-engineered IRON components, this ring is a critical component for preventing seal failure and ensuring optimal system performance.

Product Overview & Key Features

Professional Grade Quality: Manufactured to exacting standards for superior performance and durability.

Enhanced Seal Protection: Specifically designed to prevent O-ring extrusion under high pressure, dramatically extending seal life.

Robust Material Construction: Made from NBR (Nitrile Rubber) and IRON for excellent strength and compatibility with hydraulic fluids.

Precision Fit: Guaranteed to match OEM specifications for a perfect fit with the corresponding O-ring.

Reliable Performance: Ensures system integrity by maintaining a consistent seal, reducing downtime and maintenance costs.

Compatibility & Applications

This back-up ring is a direct replacement for part number 705-17-04440. Its primary application is to work in conjunction with a specific O-ring in hydraulic pumps, cylinders, and other fluid power components.

Ideal for use in:

High-Pressure Hydraulic Pumps and Motors

Hydraulic Cylinders

Valve Manifolds

Industrial Machinery requiring reliable seal performance

Note: For optimal performance, ensure this back-up ring is installed correctly on the low-pressure side of the O-ring. Always verify the part number against your OEM requirements.

Why Choose Our Back Up Ring?

Prevents Costly Seal Failure: Protects your O-rings from extrusion, preventing leaks and system contamination.

Extends Component Life: By supporting the O-ring, it reduces wear and tear, leading to longer intervals between maintenance.

Professional Reliability: Designed for professionals who demand the highest standards for their equipment.

Guaranteed Compatibility: Precision-engineered to match the original part's dimensions and performance.

Company Profile

Mido Oil Seal was founded in 2007, which is a company specializing in the sale of construction machinery oil seals. Gathering oil seals from world's famous factories, with currently over 1,000 varieties in stock. The main service is construction machinery and engineering machinery.

The company has a total of three store and a warehouse now, one of which serves as the Foreign Trade Department to customer reception and product display. The most important thing is that we have a professional team for purchasing, selling, packing, shipping and after-sale service.

Our CEO Mr. Hu has been engaged in the oil seal industry since 1995. As one of the founders, he founded the Guangzhou Construction Machinery Industry Association and served as its president.

According to the actual situation of the Chinese excavator maintenance market, he has continuously studied, researched, innovated, introduced and developed high-quality oil seal repair kits that meet the real needs of the market. Ensure that customers can buy High-performance anti-leakage effect and long-term oil sealing effect. Based on technology leadership, the company has established a market research, quality assurance and after-sales service system to fully meet customers exact needs and has won excellent results in the industry. The reputation and word of mouth have won the continuous support of domestic and international counterparts and customers. Through long-term first-line services, we know that the promotion and use of high-quality oil seals are inseparable from your support and encouragement. We always adhere to the principle of quality first and benefit sharing to provide high-quality oil seals for the customers.

In addition to online sales, we also participate in exhibitions to have better face-to-face contact with customers. 

The history of exhibition

2001 Beijing BICIS

2004 Shanghai Bauma

2005 Beijing BICIS

2006 Shanghai Bauma

2007 Beijing BICIS

2009 Beijing BICIS

2011 Beijing BICIS

2013 Beijing BICIS

2024 Moscow CTT

2024 Shanghai Bauma

FAQ

Q1. How much of the product and where can I see more details?

A1. In order to give you fast and accurate pricing information, please contact us to comfirm more details of the Machine. 

Q2. What is the advantage about your company? 

A2. Our company has professional team and professional production line. We have been doing this industry for almost 20 years.

Q3. Why should I choose your products?

A3. Our products are high quality, heat resistant, good elasticity with high cost effective.

Q4. Any other good service your company can provide?

A4. Yes. We can provide good after-sale and fast send out the goods after receive your payment.

Q5. What are your payment terms ?

A5. L/C, T/T, Western Union, MoneyGram, Alipay