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Items starting with P

Packaged Temperature Controllers

Packaged Temperature Controllers. Modular, transportable, self-contained, air temperature control systems used for event and construction heat applications. They provide accurate temperature control and air handling for large capacity temporary heating applications. They are designed to withstand the wear and tear of construction sites and the rental market. Their larger heat capacity and higher air volume fill the gap between small, portable air heaters and the large, fixed commercial air handlers used for permanent installations. They are used to provide temporary comfort heat at large capacity special events, comfort heating during commercial construction, and for curing plaster and drying paint in commercial construction.

  • SPEC #: 15760
  • Code: 18-17-05

Panel Purge System

Purge Panel. Purge panels are designed to automatically flush explosive gases out of the control enclosure by sending a protective gas such as instrument air or an inert gas through the system until enclosure volumes have been exchanged. After the purging cycle is completed, power can be applied to protective enclosure. These panels usually contain controls similar to the following: shatter-proof windows, pressurization valves, regulated and differential pressure gauges, low-pressure alarms, and purge valves.

  • SPEC #: 17641
  • Code: 17-40-01


Peeler Centrifuge. This type of centrifuge inputs a suspension into its basket. Under the influence of the centrifugal force the liquid is drained from the solids, through filter elements. The solids are collected as ‘cake’ in the basket. After washing or other treatment, if necessary, solids are allowed to dry. Solids are ‘peeled’ off using a full-basket-width scrapper, and is discharged..

  • SPEC #: 18184
  • Code: 18-08-04


Peristaltic Positive Displacement Pumps. These positive displacement pumps move fluids through a flexible tube fitted inside the pump casing. A turning rotor/cam with rollers attached to its outer circumference, compresses the tube, forcing the fluid to move through it. When the rotor/cam lifts the rollers from the tube, it re-opens, and fluid flow is induced to the pump. This process is called peristalsis. The tube prevents fluids from contaminating or being contaminated by the pump.

  • SPEC #: 18144
  • Code: 18-04-04


pH Analyzer. A device that measures the acidity or alkalinity of a solution and displays the result as a number (Example: pH=7).

  • SPEC #: 17724
  • Code: 17-20-04

Photo Diode Array Wavelength Analyzer

Photodiode Array Wavelength Analyzer. These analyzers disperse a broadband light source through a prism and direct it onto a diode array. Individual diodes can be monitored for substances that absorb light at that particular wavelength. The results are electronically modified and sent to a readout device.

  • SPEC #: 17721
  • Code: 17-20-01


Plastic Centrifugal Pumps. These centrifugal pumps are designed for use with corrosive, toxic, noxious, radio-active, and carcinogenic liquids. The pump fluid chamber is isolated from the separate external motor which drives the pump. Magnetic drives act as a link between the shaft and impeller. Similar to mag-drive pumps, except they are made from polypropylene, polyvinylidene fluoride, or similar materials.

  • SPEC #: 18136
  • Code: 18-03-06


Plastic Piping: Plastic pipes are lighter than pipes made from other materials. Their smooth inner walls promote high flow rates and resistance to the formation of deposits, preventing clogging. Though they do not have the strength of metal pipes, their flexibility provides them with enough tensile and burst strength to withstand operating pressures encountered in most service conditions. They can withstand external shocks that could cause failure in more brittle materials. They are resistant to water, nearly all acids, alkalis, salt solutions, and other corrosive liquids and gases.

  • SPEC #: 18404
  • Code: 18-40-04

Plate & Frame

Plate and Frame Heat Exchangers. These heat exchangers are fabricated from a series of thin, corrugated plates which are gasketed, welded, or brazed together depending on the application. These plates transfer heat between two fluids. Because the fluids are spread over a large surface area, the transfer of heat is facilitated and the temperature changes more rapidly. The plates are compressed together in a rigid frame to form a network of parallel flow channels with alternating hot and cold fluids. They are easily dismantled for inspection and cleaning.

  • SPEC #: 18172
  • Code: 18-07-02


PLC Control Systems. A programmable logic controller (PLC) is a digital computer used for automation of industrial processes, such as control of machinery on factory assembly lines. Unlike general-purpose computers, the PLC is designed for multiple input and outputs, extended temperature ranges, immunity to electrical noise, and resistance to vibration and impact. Programs to control machine operation are typically stored in non-volatile memory. PLCs are armored for severe condition (dust, moisture, heat, cold, etc) and have the facility for extensive input/output (I/O) arrangements. Functionality includes sequential relay control, motion control, process control, distributed control systems and networking.

  • SPEC #: 17653
  • Code: 17-50-03


Automated Plug Valve: The same as a manual plug valve (see above), except the valve mechanism is moved by an electric, pneumatic, or hydraulic motor which is controlled by a remote switch or remotely generated electronic signal.

  • SPEC #: 17940


Manual Plug Valve: Plug valves have cylindrical or conically-tapered plugs which are rotated inside the valve body to control fluid flow. These plugs have one or more hollow passageways going sideways through the plug, allowing fluid to flow through the plug when the valve is open. With conically-tapered plugs, the stem is attached to the large end of the plug. The simplest and most common general type of plug valve is a 2-port valve, which has two positions, open and shut, and is classified as a quarter-turn valve. This type of valve is often used as a shut-off valve in household natural gas lines. Some plug valves have more than two ports. In a 3-way plug valve, flow from one port could be directed to either the second or third port.

  • SPEC #: 17840

Pneumatic Conveying

Material Handling, Pneumatic Conveying: These conveyors move products through various tubes via air pressure, allowing for extra vertical versatility. They are either carrier systems or dillute-phase systems; carrier systems push items from one entry point to one exit point, such as the money exchanging tubes used at a bank drive-thru window. Dillute-phase systems use push/pull pressure to guide materials through various entry and exit points.

  • SPEC #: 18253
  • Code: 18-15-03

Point of Use Cooler

Heat Exchanger, Point-of-Use Cooler. These devices, which cool the processed media for immediate local use or local sampling, are specifically designed for taking high quality chemical, conductivity and microbiological samples quickly and safely from clean/pure steam, water for injection, and other high purity media systems. These sanitary machines are usually made from stainless steel components.

  • SPEC #: 18178
  • Code: 18-07-09

Poly - Blow Molded (See Assman tanks)

Polypropylene Vessels. These vessels can be either pressure vessels designed to operate safely at specific pressures and temperatures, or non-pressure vessels designed for use in gravity controlled and low-pressure systems. These vessels are lighter than those made from other materials. Their smooth inner walls resist the formation of deposits. Though they do not have the strength of metal vessels, they have enough tensile and burst strength to withstand operating pressures encountered in most service conditions. They can withstand external shocks that could cause failure in more brittle materials. They are resistant to water, nearly all acids, alkalis, salt solutions, and other corrosive liquids and gases.

  • SPEC #: 18102
  • Code: 18-01-08
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