pc310 hydraulic excavator

  • Ball Valve - How They Work | Tameson.com

    Ball Valve - How They Work. Figure 1: Ball valve sectional view. A ball valve is a shut off valve that controls the flow of a liquid or gas by means of a rotary ball having a bore. By rotating the ball a quarter turn (90 degrees) around its axis, the medium can flow through or is blocked. They are characterized by a long service life and

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  • Solenoids | Principle of Operation | Resources for

    Actuation for machine and process automation must range from the most basic on-off function to extremely complex sequencing. When the process involves linear or rotary motion, solenoids are among the best actuation devices in terms of size, cost, simplified installation and ease-of-use. On the following pages, we've shown several application

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  • Positive Shutoff Valves, Loading & Conveying - Una-Dyn

    Mar 23, 2020 · Positive Shutoff ValvesPrevents vacuum leakage in common material line conveying systems Positive Shutoff Valves are installed on the material inlet of a vacuum chamber when it is connected to a common material line.

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  • What is ON/OFF Valve ? | Shut-off Valves | …

    Dec 10, 2017 · An ON/OFF Valve is the fluid equivalent of an electrical switch, a device that either allows unimpeded flow or acts to prevent flow altogether.. These valves are often used for routing process fluid to different locations, starting and stopping batch processes, and …

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  • Components of Shutdown Valve | Instrumentation Tools

    Shutdown valve (SDV)shall be closed, or referred as FAIL CLOSE, whereas Blowdown valve shall be opened or referred as FAIL OPEN. In some application where there is no electrical power, pneumatic piloted valve is used in lieu of solenoid valve. It has the same principle as solenoid valve, but the power source is pneumatic instead of electrical. 2.

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  • Hydraulic and pneumatic actuators

    Directional Control Valves-3 • 3-Poppet valve: • This valve is normally in closed condition. In this valve, balls, discs or cones are used in conjunction with valve seats to control the flow. •When the push-button is depressed, the ball is pushed out of its seat and flow occurs as a result of port 1 being connected to port 2. When the

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  • Working principle and operation method of globe valve - …

    Shut off Valve Function - Different Types & How They Work

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  • How It Works: Piloted Unloader Valve - Rolair

    Aug 14, 2017 · How It Works. Piloted unloader valves combine a pilot valve and an unloader valve to run an air compressor continuously. While this type of valve is most commonly used on gas-powered air compressors, it can also be used on electric models. While the air compressor is running, the pilot remains closed until the pressure reaches the unload setting.

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  • Control Valve Working Principle - The Engineering Concepts

    Jan 07, 2003 · the valve seat and the orifice preventing a positive shut off, pressure can continually build exceeding the set pressure. If this pressure is allowed to increase, a dangerously elevated pressure situation will occur. This is where an internal relief valve steps in. The relief valve (Figure 5), usually a spring-loaded device, will allow the

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  • FUNDAMENTAL PRINCIPLES OF PRESSURE REGULATORS

    Jan 07, 2003 · the valve seat and the orifice preventing a positive shut off, pressure can continually build exceeding the set pressure. If this pressure is allowed to increase, a dangerously elevated pressure situation will occur. This is where an internal relief valve steps in. The relief valve (Figure 5), usually a spring-loaded device, will allow the

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  • BASIC OPERATION AND FUNCTION OF CONTROL VALVES

    Shut off Valve Function - Different Types & How They Work

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  • Basic Parts of Control Valves - Control Valve Functions

    A valve is a mechanical device that controls the flow of fluid and pressure within a system or process. A valve controls system or process fluid flow and pressure by performing any of the Following functions.. a) Stopping and starting fluid flow. b) Varying (throttling) the amount of fluid flow. c) Controlling the direction of fluid flow. d) Regulating downstream system or process pressure

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  • FUEL SHUT OFF VALVE - Wheel Loader Komatsu WA250-3MC

    FUEL SHUT OFF VALVE Wheel Loader Komatsu WA250-3MC ENGINE / FUEL SHUT OFF VALVE Parts scheme. Subscribe to get access to the part numbers and schemes. Unlock Access. List of spare parts. Subscribe to get access to the part numbers and schemes. Unlock Access # Part No Part Name Qty. 1: 67***80: BOLT,FUEL INJECTION: 2: 2: 67***60

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  • Valve Failure Mode | Basic Principles of Control Valves

    Sliding-stem valve bodies are classified as direct-acting if they open up when the stem is lifted, and classified as reverse-acting if they shut off (close) when the stem is lifted. Thus, a sliding-stem, pneumatically actuated control valve may be made air-to-open or air-to-close simply by matching the appropriate actuator and body types.

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  • Thermal Shutoff Valve - High Sample Temperature

    Jun 28, 2021 · Operation. The HST (High Sample Temperature) automatic thermal shutoff valve is used to sense the sample temperature after the sample cooler. Under normal conditions, the valve is wide open so the sample fluid passes through the valve. The valve's internal thermal actuator is always sensing the fluid temperature and if the temperature exceeds the valve's set point, the HST will close …

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  • FUNDAMENTAL PRINCIPLES OF PRESSURE REGULATORS

    May 28, 2020 · The globe valve is a valve sealed by using force, so when the valve is closed, pressure must be applied to the disc to force the sealing surface to not leak. The working principle of the globe valve: The valve plays an important role in cutting off and throttling the medium in the pipeline. As a very important cut-off valve, the globe valve is

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  • Dynamic characteristic analysis and fault diagnosis of

    pump is smaller than the setting value of the shut-off valve [5]. At this point, the pressure shut-off valve is in the right position and does not have the control function. The displacement regulation of the pump is carried out through the force balance relationship of the load-sensing valve: P = PL + PK (1)

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  • Slam Shut-off Valves - Vanaz

    Introduction. Slam Shut-off valve is installed immediately after the filter & prior to the Regulator. It normally remains open, in case the outlet pressure of the regulator exceeds the permissible limit, the slam shut-off valve senses it through the impulse line & immediately shut off the flow to downstream.

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  • Air compressor unloader valve | the Workshop Compressor

    Air compressor unloader valve. The output of the piston compressor is connected through a pipe to the air receiver. When the compressor stops, the pressure in this pipe is blown off to 0 bar (atmosphere). This is the ssssssshhh sound you will here when the compressor stops. At the same time, a check-valve makes sure that not the whole air

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  • Slam Shut-off Valves - Vanaz

    leak-off gland: A packing box with packing above and below the lantern ring so as to provide a collection point for fluid leaking past the primary seal (lower packing). lined valve body: A valve body in which a coating or liner has been applied to internal surfaces for cor-rosion/erosion protection or for flow shut off.

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