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Piston pump (left) compared to plunger pump (right) A plunger is a cylindrical rod used to transmit hydraulic compression force. It is characterized by its length being much greater than its diameter, and it is thus distinguished from a regular piston (where the working surface is larger than the thickness of the rod, i.e. more like a disk). [1]
The largest diameter sleeve is called the main or barrel. The smaller inner sleeves are called the stages. The smallest stage is often called the plunger [3] or piston rod. The cylinders are usually mounted in machinery by pivot mounts welded to the end or outer body of the barrel as well as on the end of the plunger.
Plunger (hydraulics), a cylindrical piston-like component whose length is larger than its diameter Plunger, a component of a syringe (though in modern syringes, it is actually a piston) Plunger pump, type of positive displacement pump with stationary seal and a smooth cylindrical plunger, suitable for higher pressures
A hydraulic cylinder without a piston or with a piston without seals is called a plunger cylinder. A plunger cylinder can only be used as a pushing cylinder; the maximum force is piston rod area multiplied by pressure. This means that a plunger cylinder in general has a relatively thick piston rod.
The diameter of the supply pipe would normally match the diameter of the input fitting on the ram, which in turn is based on its pumping capacity. The drive pipe should be of constant diameter and material, and should be as straight as possible. Where bends are necessary, they should be smooth, large diameter curves.
The S tube should swing over rapidly and not suffer undue wear. This is effected with two large-sized plunger cylinders and a so-called spectacle plate (so named from its shape) including seal rings. In cross section the S-tube is circular with a diameter which tapers in the direction of flow. This keeps the risk of clogging down.
A mud pump (sometimes referred to as a mud drilling pump or drilling mud pump), is a reciprocating piston/plunger pump designed to circulate drilling fluid under high pressure (up to 7,500 psi or 52,000 kPa) down the drill string and back up the annulus. A mud pump is an important part of the equipment used for oil well drilling.
The upper side of the piston is larger, the full diameter of the piston, and is supplied with water through a throttling valve; normally adjusted and then left in position. The lower side of the piston is an annular space surrounding the moving valve body and maintained at the lower (Bernoulli) water pressure.
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