What is a metering valve used for?

A brake metering valve is used to Balance the Braking Forces. It is only found on vehicles with front disc and rear drum brakes. The metering valve holds back fluid to the front brakes until enough pressure is created to overcome the return springs inside the rear drums.

What is a metering check valve?

In an automotive hydraulic braking system, metering valve momentarily delays application of the front disk brakes until the rear drum brakes begin to act. Metering valves are multi-turn valves designed to regulate the flow of fluid.

How do I choose a steam valve?

Proportional control valves should be sized using a pressure drop through the valve of 80% gauge inlet pressure (PSIG) for low pressure steam systems. (Low pressure is generally defined as systems carrying 15 PSIG of less.) For steam pressures over 15#, recommended pressure drop is 50% of inlet gauge pressure.

Does steam temperature drop across control valve?

With saturated steam, temperature and pressure are strictly related; therefore controlling the steam pressure easily regulates the temperature. As the valve orifice is smaller the pressure drop across the valve must be greater, leading to a lower pressure (and temperature) in the heat exchanger.

Do I need a metering valve?

For your disc / drum brake system, a metering valve is essential for proper balance. A metering valve will control fluid flow from the master cylinder causing the rear drum brakes to engage just before the front disc brakes. This allows the car to settle evenly under braking instead of nose diving.

What happens when a metering valve goes bad?

Since the proportioning valve decreases the pressure sent to the rear brakes, the main symptom the valve is going bad is the rear wheels locking up when the brakes are applied. Furthermore, the wheels will lock up more easily on wet surfaces. The rear brakes may feel touchy when applied even gently.

When should check valves be used?

A check valve will be used commonly on the discharge of the pump to prevent backflow from the downstream system, when the pump shuts off. Check valves are also used to prevent contaminated media in branches from flowing back into the main trunk line.

Where is a check valve located?

There are check valves in the home. A check valve is located in the discharge line of the pump in the basement. They are found in almost every industry where a pump is located outside the home.

Which valve is best for steam?

globe valve
By far the most widely used valve type for the automatic control of steam processes and applications is the globe valve. It is relatively easy to actuate, it is versatile, and has inherent characteristics well suited to the automatic control needs of steam.

Which valve is suitable for steam line?

Gate valve is mainly used for steam pipeline where no need frequent open or closure; The globe valve offers a better function of flow regulation.

What type of valve is used for steam?

Ball valves
Ball valves are commonly used in steam, water, oil, gas, air, corrosive fluids. They can handle slurries and dusty dry fluids.

Why is low pressure steam more efficient?

Explain why low pressure steam is more efficient? The low pressure steam has more latent heat compared with the high pressure steam. Indirect heating efficiency will be more for low pressure steam.

What kind of valves are used for metering?

Turn the handle to adjust flow in small increments for metering, sampling, and other applications requiring fine flow control. Often used in hydraulic and compressed air systems, these valves can withstand at least 6, 000 psi. They’re for use with water, oil, air, and inert gas.

What kind of metering valve does parkerca use?

The N series of hydraulic flow control, in-line needle valves meters flow in both directions or provides a reliable shut off. This needle valve flow control is used in air and oil applications and has standard and fine metering options.

Is it OK to use wet steam on a flow meter?

Steam should always be provided in as dry a condition as possible at the point of metering. Module 4.4 has already demonstrated that wet steam will cause inaccuracies and can physically damage some types of flowmeter.

What are the different types of steam flowmeters?

There are many types of flowmeter, those suitable for steam and condensate applications include: Orifice plate flowmeters. Turbine flowmeters (including shunt or bypass types). Variable area flowmeters. Spring loaded variable area flowmeters. Direct in-line variable area (TVA) flowmeters.