Glossary

Heat Exchanger - It's a device that is attached to oil reservoir to circulate water/air to keep oil at proper operating temperatures. .

Heated Platens - These are plates having heating capabilities and can be heated using steam, electric rods, oil, water or other medium. These systems usually require thermal breaks between heated plates and hydraulic press structure. Further, heating controls can be separate/fully integrated into press control system. .

H-Frame Hydraulic Press - These are commonly known as 4 column hydraulic press and have construction style that resembles letter H. A H-frame hydraulic press can be used in multiple press applications simultaneously. These can be made available in a wide range of hydraulic press lines from 3-200 tons and serve needs of rubber, plastics, composite and printed circuit board markets. .

Horsepower - It's a standard unit of power or work where Hp is equal to 550 ft lb. of energy/work done per second, 33,000 ft lb. of work per minute, 0.746 KW, or 42.4 BTU per minute. .

Hydraulic Balance - It's a condition of equal opposed hydraulic forces that acts on an element in hydraulic component. It's a condition where opposing hydraulic forces are equal. .

Hydraulic Detent - It's a valve configuration that applies open actuator port pressure against axial control surface of spool to hold valve spool position until greater axial force is applied for shifting valve in opposite direction. .

Hydraulic Fuse - It's a hydraulic fuse designed to provide excess flow protection and automatically shuts off any line where failure (component rupture/fracture) has occurred and where hydraulic fluid spews out of system. Its analogous to electrical safety device called "fuse" where strip of metal melts and interrupts circuit when current exceeds particular amperage. These devices comprise different types of excess-flow valves and are used to block flow and not to relieve pressure as performed by hydraulic system protector. .

Hydrokinetics - Its engineering science that pertains to forces produced by liquid as result of its motion. For example centrifugal pump. .

Hydrolytic Stability - Its resistance to permanent changes in properties that are caused by chemical reaction with water. I Inertance, Hydraulic - It's a quantity related to inertial forces which are needed for accelerating or decelerating fluid in conduit or passage. It is analogous to electrical inductance. .

Inertial Load - It's the reaction force that results from acceleration of mass and is equal to product of mass and acceleration. The force always acts opposite direction to that of actuator motion. .

Inertial Load - It's a reaction force that results from acceleration of mass and is equal to product of mass and acceleration. It always acts in direction opposite to that of actuator motion.

Jack - It's a single-acting cylinder that can be pressure actuated in only one direction. K Kinetic Energy - Its energy that substance/body possesses by virtue of its mass (weight) and velocity. .

Knockout - Its a device for stripping the part from punch or die.