Hydraulic Seals

Style: Hydraulic

Hydraulic seals and pneumatic seals include piston seals, rod seals, U-cups, vee, cup, W, piston, and flange packings. Hydraulic seals and pneumatic seals are designed for the reciprocating motion that is common in hydraulic and pneumatic applications, such as cylinders. Hydraulic seals are designed for high-pressure dynamic applications such as hydraulic cylinders. Pneumatic seals are used in pneumatic cylinders and valves and generally are designed for lower operating pressures than hydraulic seals. Pneumatic applications also typically demand higher operating speeds and lower friction seals than hydraulic applications. These seals may be used for rotary and reciprocating motion. Some hydraulic seals and pneumatic seals are composite. Composite seals are two- or multi-part seals manufactured as an integral unit. A typical composite seal consists of an integral PTFE ring and elastomer ring, providing the properties of an elastomeric ring with a rigid, low friction (PTFE) working face. These seals can have a variety of different cross sections. Some forms of composite seals are also referred to as polyseals, wedge-action seals, crown seals and tri-seals (3 part seals). Common sealing orientation and directions for hydraulic seals and pneumatic seals include internal or rod seal, external or piston seal, symmetric seal, and axial seal. Rod seals are radial seals. The seal is press-fit into a housing bore with the sealing lip contacting the shaft. Also referred to as a shaft seal. Piston seals are radial seals. The seal is fit onto a shaft with the sealing lip contacting the housing bore. V-rings are considered external lip seals. Symmetric seals are symmetrical and works equally well as a rod or a piston seal. An axial seal seals axially against a housing or machine component. Sealing direction pertains primarily to hydraulic and pneumatic seals that are used in applications with axial motion, such as cylinders and pistons. The action can be single or double. Single acting, or unidirectional seals, offer an effective seal in one axial direction only. In order to seal in both directions for a reciprocating motion, more than one seal must be used. Double acting, or bi-directional seals, are effective when sealing in both directions.Important dimensions to consider when specifying hydraulic seals and pneumatic seals include shaft outer diameter or seal inner diameter, housing bore diameter or seal outer diameter, axial cross section or thickness, and radial cross section. Important service limits parameters to consider include maximum operating speed, maximum operating pressure, vacuum rating, and operating temperature. Rubber sealing element or lip material choices for hydraulic and pneumatic seals include ethylene acrylic, EDPM, fluoroelastomer, fluorosilicone, nitrile, nylon or polyamide, polychloroprene, polyetheretherkeytone, polyoxymethylene, polytetrafluoroethylene, polyurethane or urethane, and natural rubber. Metallic choices include sintered bronze, cast iron, and stainless steel. Other materials include felt and leather. Many seal manufacturers use their own proprietary material. Consult with manufacturer for proprietary material specifications. Common features for hydraulic seals and pneumatic seals include spring loaded, integral wiper, and split seal.

Hydraulic Seals

  • Style:Hydraulic
ZJ slurry pump spare parts-the difference between mechanical seal cartridge type and non-cartridge type
ZJ slurry pump spare parts-the difference between mechanical seal cartridge type and non-cartridge type

One type of shaft seal for slurry pumps is mechanical seals, but mechanical seals are divided into cartridge mechanical seals and non-cartridge mechanical seals. Today we will talk about the differences between these two types of machinery. Cartridge mechanical seals combine ...

Pansto Pump Co., Ltd

ZJ series slurry pump seal failure
ZJ series slurry pump seal failure

ZJ series slurry pump seal failure can be divided into initial type, wear type or random type. Statistically speaking, random failure, also called accidental failure, is the main type. Initial failures are usually caused by incorrect seal selection, installation or startup, and ...

Pansto Pump Co., Ltd

What is the scope of application o Y-type sealing ring?
What is the scope of application o Y-type sealing ring?

Y-shaped sealing rings are widely used in reciprocating sealing devices, and their service life is longer than that of O-shaped sealing rings. The applicable working pressure of the Y-shaped sealing ring is not greater than 40MPa, and the working temperature is -30~80℃; ...

Pansto Pump Co., Ltd

Y-type sealing ring
Y-type sealing ring

What is a Y-type sealing ring and what is its function? Today Shijiazhuang slurry pump manufacturer will introduce it to you. The Y-shaped sealing ring has a Y-shaped cross-section and is a typical lip sealing ring. Because its service life and sealing performance are higher ...

Pansto Pump Co., Ltd

O-ring sealing tips
O-ring sealing tips

The O-type sealing ring is a rubber sealing ring with a circular cross-section. Because its cross-section is O-shaped, it is called an O-type rubber sealing ring, also called an O-ring. It began to appear in the mid-19th century, when it was used as a sealing element for steam ...

Pansto Pump Co., Ltd

The function of O-ring seal
The function of O-ring seal

The O-ring is an extrusion seal. The basic working principle of the extrusion seal is to rely on the elastic deformation of the seal to cause contact pressure on the sealing contact surface. If the contact pressure is greater than the internal pressure of the sealed medium, ...

Pansto Pump Co., Ltd

O-ring sealing form
O-ring sealing form

The O-rings of horizontal slurry pumps can be divided into static seals, reciprocating seals, rotating seals and switch seals according to the relative movement state between the seal and the sealed device. According to the compression amount (tightness) of the O-ring ...

Pansto Pump Co., Ltd

O-ring sealing characteristics
O-ring sealing characteristics

Although the O-ring for sealing the slurry pump is a very small accessory in the entire assembly of the slurry pump, its role is irreplaceable. Today we will talk about its characteristics. As for the O-ring used for reciprocating motion, its motion friction resistance is ...

Pansto Pump Co., Ltd

Product Advantages and Characteristics of Hydraulic Swing Door
Product Advantages and Characteristics of Hydraulic Swing Door

The electro-hydraulic swing door is opened by the motor and closed by the hydraulic door closer. Its structure and working principle are that the electric motor drives a heavy hydraulic door closer through an oil pump to realize the door opening process, and then the door ...

Dongguan Xinyi Door Industry Co.,Ltd

GHS-01 Gradient Heat Seal Testing Machine ASTM F2029 Heat Seal Strength Tester
GHS-01 Gradient Heat Seal Testing Machine ASTM F2029 Heat Seal Strength Tester

GHS-01 Gradient Heat Seal Tester Application A Gradient Heat Seal Tester is an indispensable device within the packaging industry, specifically designed to assess the heat-sealing properties of a wide array of materials. These materials include films, laminates, and various ...

Cell Instruments Co., Ltd