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  2. Piping and instrumentation diagram - Wikipedia

    en.wikipedia.org/wiki/Piping_and_instrumentation...

    Permanent start-up, flush and bypass lines; Pipelines and flowlines; Blinds and spectacle blinds; Insulation and heat tracing; Process control instrumentation and designation (names, numbers, unique tag identifiers), including: Valves and their types and identifications (e.g. isolation, shutoff, relief and safety valves, valve interlocks)

  3. Gravely Tractor - Wikipedia

    en.wikipedia.org/wiki/Gravely_Tractor

    The 800 series was replaced with the 8000 series by 1978, which offered more powerful engine configurations and an improved hydraulic lift option, yet retained the eight-speed transaxle. Many of the parts for the 800 and 8000 series designs, excepting the engine, are the same or compatible, and are readily available as new and used parts online ...

  4. Zero-turn mower - Wikipedia

    en.wikipedia.org/wiki/Zero-turn_mower

    A commercial zero-turn lawn mower with two pivoting front wheels. A zero-turn riding lawn mower (colloquially, a z-turn or zero turn) is a standard riding lawn mower with a turning radius that is effectively zero when the two drive wheels rotate in opposite direction, like a tank turning in place.

  5. Wheel Horse - Wikipedia

    en.wikipedia.org/wiki/Wheel_Horse

    There were eleven models in four lines of lawn and garden tractors by 1974: the 8 hp (6.0 kW) "economy" A Series with standard 32-inch mower and electric or recoil start, the "compact" B Series with a four-speed or automatic transmission, the C Series offering four models (the C-120 and C-160 automatic, and the C-100 and C-160 8-speed and the ...

  6. Hydraulic manifold - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_manifold

    A manifold is composed of assorted hydraulic valves connected to each other. It is the various combinations of states of these valves that allow complex control behaviour in a manifold. [ 1 ] [ citation needed ] A hydraulic manifold is a block of metal with flow paths drilled through it, connecting various ports. [ 2 ]

  7. Blowoff valve - Wikipedia

    en.wikipedia.org/wiki/Blowoff_valve

    A blowoff valve is designed to release pressure in the intake system when the throttle is closed. A "recirculating" type blowoff valve releases the pressurised air back into the non-pressurized section of the intake (i.e. upstream of the turbocharger), while an "atmospheric venting" type blowoff valve dumps the air directly into the atmosphere.

  8. Electrohydraulic servo valve - Wikipedia

    en.wikipedia.org/wiki/Electrohydraulic_servo_valve

    A servo valve receives pressurized hydraulic fluid from a source, typically a hydraulic pump. It then transfers the fluid to a hydraulic cylinder in a closely controlled manner. Typically, the valve will move the spool proportionnaly to an electrical signal that it receives, indirectly controlling flow rate.

  9. Check valve - Wikipedia

    en.wikipedia.org/wiki/Check_valve

    A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction. [1] Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various ...