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Check Valve

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Check Valve
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Have you ever gone to a service station? The Cars are usually loaded onto a platform which rises gradually. This platform uses the same tool called The Hydraulic Jack. This device or a mechanical instrument is used to raise heavy objects manually with the need of human effort. The most common ones are the mechanical jacks. However there are few others like floor jacks and bottle jacks which are often used. All of them employ the same basic phenomenon but they differ in their shape.

A hydraulic jack uses a fluid, which is incompressible and is constrained into a cylinder by a pump piston. Oil is utilised, as the plunger backs away, it guides oil out of the source by a suction valve in side the pump chamber. When the piston displaces ahead, it drives the oil through a discharge check valve into the piston chamber. The suction valve ball is within the chamber and cleals with each pass of the plunger. The dispatch valve ball is out of the chamber and opens when the oil is forced into the cylinder. Now the suction ball inside the chamber is closed and pressure of the oil increases in the piston chamber.

The Jacks are usually used to lift heavy objects. They can use different methods like the car jack uses the lead screw to lift the heavy car. The Acme threads withstand heavy weighed cars. Likewise, the Hydraulic jack is also used to lift heavy objects by a manual force. Pascal's principle is used here, which states that the pressure in a closed container is same at all points. A force divided by area using this equation defines the pressure. Hydraulic jack is built with two cylinders, one big while the other small. One application of a small force can lift heavier objects placed on the bigger cylinder; both these cylinders are filled with oil.

Hydraulic jacks are distributed to different types with a difference in construction. There are Floor Jacks in which the horizontal piston presses on the short end of a bell crank, with the long arm providing the vertical motion to an elevating pad, kept level with a horizontal linkage. Floor jacks usually include castors, which allow compensation for the curve adopted by the lifting pad. This mechanism allows for a low profile when collapsed, for comfortable operation beneath the vehicle, while providing extensive elongation.

In Bottle Jacks the piston is upright and directly holds a bearing pad that holds the object being hoisted. With a single action piston the elevation is slightly less than twice the folded height of the jack, making it appropriate only for cars with a comparatively high clearance. For elevating structures like houses the hydraulic interconnection of multiple perpendicular jacks through valves enables the level distribution of forces while sanctioning close control of the lift.

The Hydraulic jack is quite an important instrument in construction industry and workshops because it decreases a lot of work for the mechanics and laborers, and they have vast applications in these fields.

Writing on Innovative Ideas is like a passion for Aya Wilkinson. Her Jos as Team Leader of Writers at http://www.aclickahead.co.uk has give her immense opportunities to write on a variety of topics including Hydraulic jack and Hydraulic jacks

How to choose the Poppet Valve

Vernay Laboratories designs and manufactures precision molded elastomeric parts. Our primary area of expertise is in the design and manufacture of elastomeric check valves for fluid control applications. Our standard product lines include a variety of check valve designs both fully elastomeric and elastomer over molded onto metal or plastic inserts. One of these product lines is a family of poppets which can be used to make valves. Both all rubber designs and designs with rubber bonded to metal or plastic substrates are available.
Poppets are typically used as check valves, pressure relief valves, or regulating valves. They can be more expensive to apply than other all rubber valve designs but have several advantages that make them the desired choice as check valves, pressure relief valves and pressure regulating valves.

 

Typical Poppet Valve Applications

Some of the advantages of the Vernay¡¯s all rubber and rubber tipped poppets include:

Superior sealing and leakage prevention due to the integrally molded, permanently bonded seal and, with guided operation, the sealing point consistently contacts the seat at the same point each time allowing it to conform to the shape of the seat.
Low noise (as compared to all metal poppet designs)
Streamlined flow around the ball or cone shaped tip
Precise opening pressure control as a result of using a metal spring

Factors that should be considered when selecting a poppet valve:

The environment the poppet will work in (fluid being controlled, operating temperature, etc.)
Desired flow rate and pressure drop
Desired opening pressure
The control required (acceptable variation) of both opening pressure and flow or pressure drop regulation
Acceptable noise generation

 

All rights reserved by FBIC Inc., do remember to show the source (www.fsbic.com) of the news when copying

About the Author

FBIC Inc., a member of Siduona group in flow-control business, has over 15 year experience in manufacturing ball valve, gate valve, globe valve, check check valve, plug valve and butterfly valve in carbon steel, stainless steel Valve.

Where is the check valve located on my sprinkler system? I have to prime it everyday to get ittowork. HELP?

I can take photos of my pump and piping and email it to anyone who can help me with my problem. I have an idea where the check valve is located, but i can not get to it without cutting the pipe. Please help me

The check valve is located before the pump on the suction side. Go ahead and cut the plastic pipe on both sides of the check valve to remove it. Stick the right side of the new check valve in the pipe going to the well. You can tell which way is right by the arrow on the check valve. The arrow should point towards the pump. If you dont have enough pipe coming from the pump, use a new piece between the check valve and the pump.

Good Luck!

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