Gate Valves Selection Guide: Types, Features, Applications
WEBGate valves are usually divided into two types: parallel and wedge-shaped. The parallel gate valve uses a flat disc gate between two parallel seats, upstream and downstream. Shut-off is obtained by the free-floating seat or disk gate allow the upstream pressure to seal the seat and disk against any unwanted seat leakage.
Bolts Selection Guide: Types, Features, Applications - GlobalSpec
WEBA bolt is a type of threaded hardware fastener that is used to position two workpieces in specific relation to each other. Bolts come in several configurations for their application and specification variances. Since the terms "bolt" and "screw" were in use before the advent of easily-produced helix fasteners, they are often synonymous.
Washers Selection Guide: Types, Features, Applications - GlobalSpec
WEBOther Common Types : Flat washers, also referred to as Type A plain washers, are thin, flat, and circular general-purpose washers with a centrally located hole. Standardized flat washers may be designed by the use of imperial or metric dimensions. Standard imperial washers include SAE washers, for use with fine threaded nuts and bolts, and USS flat washers, for use with coarse threaded bolts ...
Laboratory Tongs Selection Guide: Types, Features, Applications ...
WEBLaboratory tongs are large pincers for grasping and lifting vessels of heat-resistant material used in high temperature chemical reactions. Tongs differ in shape are designed to pick up laboratory items including, hot evaporating dishes, beakers, crucibles, and other laboratory apparatuses. The main type of laboratory tongs are Crucible tongs ...
Rotary Switches Selection Guide: Types, Features, Applications
WEBThere are two basic styles: single-deck and multi-deck. Each deck is a round plate with an arrangement of contacts. Single deck rotary switches can control several circuits at a time. Multi-deck rotary switches can control several circuits simultaneously. Multi-deck (left) and Single deck (right) rotary switch.
Heat Exchangers Selection Guide: Types, Features, Applications
WEBPlate coil or panel coil heat exchangers are a hybrid of tube heat exchangers and plate heat exchangers. They consist of coils of tube containing a heat transfer fluid connected or adjacent to a plate, panel, or wall which holds another fluid. These devices are relatively inexpensive and simple to maintain since the coils can be easily removed.
Screws Selection Guide: Types, Features, Applications - GlobalSpec
WEBA cone point is very sharp and will provide an accurate pilot for threading. Type-A points are best utilized as replacement screws or with predrilled holes in thin metals. Type-B points are similar to Type A, but are meant for thick metals. Type-AB combines the precision point of Type A with the ruggedness of Type B.
Motor Circuit Breaker Sizing Calculator | GlobalSpec
WEBPF=Power factor. V=Line voltage. E=The efficiency of the motor. Keep in mind that this circuit breaker sizing only considers motor overload, which happens when the operation of a motor (in excess of its normal, full-load rating) persists for a long enough time that it damages or overheats the motor. When specifying motor circuits, engineers ...
Pillow Block Bearings Information - GlobalSpec
WEBPillow block bearings, sometimes referred to as plummer block bearings, are mounted bearings that are used to provide load support for a rotating shaft. Their mounting surface is on a plane parallel and offset to the axis of the shaft. Mounting holes or slots in the base or feet of pillow block bearings permit adjustment and easy mounting.
Pneumatic Valve Actuators Selection Guide: Types, Features ...
WEBPneumatic actuator for valves and dampers. Video Credit: Industrial Controls / CC BY-SA 4.0 Actuation time is the time it takes to fully close the linear motion valve.. Acting type is an additional specification.. With single-acting devices, fluid pressure actuates the valve in one direction while a compressed spring actuates the valve in the other.. With double-acting devices, fluid pressure ...