
Hby Type Reciprocal Movement Buffer Rings
Model: HBY
Temperature: -55/+120℃
Speed: ≤1m/s
Pressure: ≤50MPa
Product Introduction
Our u cup usi, rod step seal catalogue, stainless steel oil seals has the advantages of mature and exquisite craftsmanship, flexible product structure, and the ability to adapt to market and environmental requirements. Mainly do wholesale, so we have the most competitive price, but highest quality. We have established extensive business relationships with companies from all over the world. We are always committed to meeting customer needs and creating social value together with customers, and are therefore deeply trusted.
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 pursue perfection and excellence, and win recognition and respect with high quality Hby Type Reciprocal Movement Buffer Rings and services. The company earnestly implements the corporate tenet of quality first and reputation first, and has obtained a pass to enter the international market. We truly implement the principle of 'quality assurance as the guide, customer satisfaction as the core, and courteous service as the backing'.
Hot Tags: hydraulic buffer ring hby, China, suppliers, manufacturers, factory, customized, wholesale, u cup BS, ptfe lip oil seals, oil seal tc type, oil seal double lip, Hydraulic Wiper Seals GSZ, glyd ring installation





