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The Light and Power Department is a full-service electric utility providing reliable electric service to customers in Forest Grove and surrounding areas.

Hydraulic cylinderseal kit

Note: We are currently undergoing staff changes and ask that for any new projects, contact the Light & Power personnel on our main line at 503-992-3250

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Forest Grove Light and Power was founded in 1895 and is the third oldest municipal electric utility in the State of Oregon. Power was first generated locally by means of a small hydroelectric plant and later by steam and diesel generators. Since 1939, Forest Grove has purchased the majority of its power from Bonneville Power Administration (BPA).

Hydraulicseal materialtypes

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With hydraulic cylinders, there is more than meets the eye. To contain the pressurized fluids in a hydraulic cylinder system and keep it in motion, a complex configuration of high-performance seals in two basic categories are required: (1) static seals and (2) dynamic seals (supported by guide rings).

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Types of hydraulic sealspdf

Our engineering personnel will work with you to design the installation necessary to accommodate the new service based on our published Electric Service Requirements and Guidelines manual. Please submit plans of the project to assist with the design process.

In rebuilding a brake caliper, I discovered that one piston has a seal with a “V” shaped cross section and one with a square section. The other piston had these seals reversed. Your article provides some information to help me decide which seal goes where, but a diagram showing the shapes of seals used for different purposes would make the article even more helpful.

Hydraulic cylinder sealsCatalog

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Outdoor area or security lighting from dusk to dawn daily. A wide range of lighting options are available. Lights will be installed and maintained by the Light & Power Department, and billed monthly based on the type of installation. Additional installation charges may apply.  Contact 503.992.3294 for program details.

Hydraulic cylinder sealsexplained

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Let’s examine some specific types of seals in each category. Static Seal. A seal that is not subjected to any type of movement when pressurized. This includes O-rings, D-rings, back-up rings, cover seals and gaskets. One of the simplest examples of a static seal is the O-ring. O-rings are very versatile and available in various sizes. When placed into the cylinder housing and squeezed by a casing, the O-ring creates a physical barrier between the housing and the casing. Commonly used with back up rings for pressures over 1500 p.s.i., O-rings in nitrile rubber (NBR), fluoro rubber (FKM) and ethylene propylene diene (EPDM) are suitable for use in a multitude of different mineral oils, water and water-based fluids and air. Other compounds such as Polyurethane (TPU) and silicone also have uses in a static environment.

Hydraulic cylinders are used to perform work in a bevy of different situations and applications every day. Whether it’s the plow truck clearing the road, a utility vehicle fixing an electrical issue, or a compactor at the local recycling center—hydraulic cylinders are in motion almost everywhere.

Today, about 90% of Forest Grove’s power is purchased from BPA. The remaining 10% comes from two Grant County, Washington, hydroelectric projects.

Guide Ring. Resin-bonded fabric, guide tape and engineered plastics that guide the piston in the cylinder bore and rod in the cylinder head of a hydraulic cylinder. Guide rings are used to prevent damage from side loading as they prevent metallic contact between axial and rotational components from contacting one another. In addition, guide rings also help to trap contaminants sub-surface before they reach the most critical sealing elements.

Hydraulic cylinderseal name

The Light & Power Department will create a safe and supportive workplace for its employees, continue to provide high-quality electric utility service at a reasonable cost for the customers in the City of Forest Grove and in the unincorporated service area, and provide a valuable return to the Utility's owner, the City of Forest Grove. We will conduct all activities as responsible stewards of the resources at our disposal.

Duo-cone seal / floating face seal consists of two separate metal seal rings and two o-rings that provide elastic compression within housing bores.

Dynamic Seal. A seal that is subjected to axial and/or radial movement when pressurized. This includes piston seals, rod seals, rotating seals, wipers/scrapers and oil seals. Piston seals prevent pressurized fluid from leaking across the piston as the system pressure pushes the piston and rod assembly down the cylinder bore. Rod seals hold pressure in the cylinder by preventing fluid from leaking out. Leakage through the rod seal can reduce equipment performance and in extreme cases cause environmental issues.  Wipers, also known as scrapers, prevent contaminants such as dirt, dust and moisture from entering the cylinder as they retract back into the system. Contamination can cause significant damage to the rod, cylinder wall, seals, and other components, and is one of the primary causes of premature seal and component failure in a fluid power system.