
OEM Custom Rubber Butterfly Valve Seal Ring
Model: HBY
Temperature: -55/+120℃
Speed: ≤1m/s
Pressure: ≤50MPa
Product Introduction
The system of product management and the degree of refinement is the embodiment of the competitiveness of our dust seal, roto glyd ring catalogue, Piston Rod Seals, good product management is the real effective enterprise management. Welcome domestic and foreign merchants, all production and distribution manufacturers to contact us to discuss business, our factory will serve you wholeheartedly. In the future development, we will keep exploring new business areas as always, continue to increase investment, accelerate the pace of corporate development, and serve the domestic and foreign market. Because we are professional and responsible, so customers are assured and satisfied. All staff of the company are looking forward to your presence and cooperation for common development. The company has established an independent technology research and development center, with a number of certificates and proprietary technologies with independent intellectual property rights.
Description
HBY hydraulic buffer seal, mounted on the pressure side of the piston rod seal, is designed to improve the durability of the piston rod seal by venting the pressure back to the system side. The main parts of the buffer seal are the static lip, dynamic lip, radial slots, and radial channels. The static lip of the seal is optimized with high flexibility to relieve the interstage pressure. The dynamic lip can minimize the friction and back pressure under high-pressure condition. The radial slots of the buffer seal are designed to reduce the risk of blow-by. The radial channels, a vital element in the whole seal structure, facilitate back-pumping and relieve the pressure.
Seal Ring Material | NBR or PU |
Seal Ring Color | Ivory, Red, Blue |
Back Up Ring Material | POM |
Color | Black or White |
Speed | ≤1m/s |
Temperature | -55 to 120℃ |
Pressure | ≤50MPa |
Medium | Mineral oil based hydraulic fluids, barely flammable hydraulic fluids, water, air and others |
Application | Excavators, Standard cylinders, Mobile hydraulics, Presses etc. |
Standard or can fit the groove | Comply with standard of NOK-HBY series |
Pressure | 35 Mpa | 42 Mpa | 50 Mpa |
Max Gap E | E≤0.8mm | E≤0.4mm | E≤0.25mm |

Installation Dimension table based on Metric Size (mm)
d f8 | D H9 | L +0.2 | H |
40~190 | d+16 | 6.3 | 6 |
200~220 | d+21 | 8 | 7.7 |
Feature
● A long service life to minimize maintenance and downtime
● No adhesion to the sliding surface
● Excellent abrasion and wear resistance
● Leak-free performance
● Resistant against high temperature and pressure
● Effective in relieving any pressure built up in the hydraulic system


The company has 5,000 square meters of professional production plants, 2000 square meters of constant temperature and humidity production workshop, dozens (sets) of advanced production equipment.
Own a professional and technical production team and sales service team.
The selection of raw materials are international first-line brand suppliers, In order to ensure product quality, we promise that don't add waste (recycled materials) in the material.


We provide our customers with consistently high quality OEM Custom Rubber Butterfly Valve Seal Ring through a high degree of automation, efficiency and attention to detail. We carry out sincere cooperation, following and respecting the laws and regulations and cultural customs of the countries where we operate. We will wholeheartedly cooperate with you with excellent quality, lowest price and considerate service.
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