What is a trip throttle valve?

What is Trip-Throttle Valve? Throttle/trip valves provide effective flow control and emergency shut-off operation in a single, highly reliable valve assembly. They add a critical safety measure to these applications as trip valves, without the cost of a distinct trip valve.

How does a trip and throttle valve work?

When tripped either manually or automatically, the valves rapidly shut down flow to protect valuable equipment. Throttle Valve Function: The valve can be opened or closed to any desired flow by means of a motorized operator or manual handwheel.

What is the function of throttle valve?

In a conventional gasoline engine, a throttle valve is used in the intake manifold to reduce the power output for part-load operation. Varying the throttle position (TP) controls the amount of mixture (air + fuel) inside the engine, while the AFR is kept constant.

How does a trip valve work?

When supply pressure falls below the trip point (see below figure), the trip valve causes the actuator to fail up, lock in the last position, or fail down. When the supply pressure rises above the trip point, the trip valve automatically resets, allowing the system to return to normal operation.

What is a governor valve?

The governor valve is a mechanical valve used in non-electronic hydraulically controlled transmissions. It varies governor pressure proportional to vehicle speed. If the vehicle is traveling around 20 mph, there should be around 20 psi in the governor’s circuit. The output shaft drives the governor valve.

What is the purpose of the trip pin in the turbine shaft?

A multi-valve, multi-stage turbine protection system incorporates a mechanical overspeed device (trip pin) to shut down the turbine on overspeed (10 percent above maximum continuous speed).

What is tripping of turbine?

A turbine trip is the emergency shutdown of a power-generation turbine due to unexpected events. Many events can cause a turbine trip, including: turbine overspeed condition where the turbine accelerates over its design speed, typically by 10% low vacuum in the secondary cooling loop, or condenser.

What is the main function of a throttle valve Mcq?

Explanation: The purpose of a throttle valve is to control the quantity of the air-fuel mixture and it is attached to the accelerator pedal.

What will happen if the throttle valve closed fully?

Even when your throttle body’s blade closes entirely, some air has to get through to the intake manifold. Otherwise, your engine would stall. This air flows through a special tunnel known as the idle air bypass. This bypass provides just enough air to keep your engine running while your car is in idle.

What is turbine overspeed trip?

Outdated Mechanical Trip Devices Should be Replaced! Background. The steam turbine overspeed event occurs when little or no energy is being consumed by the driven equipment, whether a generator, pump or compressor, and too much steam is provided to steam turbine.

What are the three types of governors?

Following are the three different types of governors used in automobile vehicle:

• Mechanical or centrifugal governor.
• Pneumatic governor.
• Hydraulic governor.

What is the function of governor?

The primary function of the governor is to preserve, protect and defend the constitution and the law as incorporated in their oath of office under Article 159 of the Indian constitution in the administration of the State affairs.

Why do you need a trip and throttle valve?

Trip and Throttle Valve Modifications. Designed to control steam flow and prevent catastrophic failure, a trip and throttle (T) valve is a critical safety device on a steam turbine. The reliability of a T valve is essential to ensure the safe operation of the steam turbine and the safety of personnel working around the equipment.

What is the trip and throttle valve of a steam turbine?

In this article the #trip and #throttle #valve of #steam #turbines are described, with short discussion on Material selection, mechanical overspeed device and electrical overspeed device.

Where are the throttle valves located on a Westinghouse turbine?

The turbine throttle valves (sometimes referred to as stop valves), located in throttle valve/steam chest assemblies, serve two functions: the control of turbine speed when in the full arc steam admission mode during heatup of the turbine, and rapid closure (tripping shut) to isolate steam flow to the high pressure turbine upon a turbine trip.

What are the different types of throttling valves?

The following graphic attempts to give relative representation of the four major valve styles used for throttling service. Both butterfly and ball valves are sub-classified as “high recovery valves”. As a general rule, globe and eccentric plug (rotary globe) styles tend to make “better” throttling control valves. -6-