They indicate the internal pressure within vessels or systems and are used particularly for environments where the pressure changes frequently, therefore requiring constant monitoring. Read More…
DuraChoice Co.Irving, TX | 800-540-3050
DuraChoice Co. specializes in design, manufacturing, and distribution of valves, fitting, and related products for commercial and industrial uses. We offer a variety of products including stainless steel and brass ball valves, gate valves, stainless steel and brass fittings, butterfly valves, industrial valves and fittings, and OEM and special products. We are located in Irving, Texas but serve customers nationwide. Visit our website or call us today for more information about our products!$$$
Gage-It, Inc.Sellersville, PA | 800-869-7294
For the highest quality pressure gauges, the only call you need to make is to Gage-It. We are a distributor of process gauges, contractor gauges, low pressure gauges, precision test gauges, stainless steel gauges and liquid filled gauges. If what you need isn’t in stock, we’ll get it! We serve industries such as; automotive, biotechnology, dairy/food, government, printing, pharmaceutical & more.$$$
Winters InstrumentsToronto, ON | 800-946-8377
Winters Instruments is a global instrumentation manufacturer of products such as high and low pressure gauges, differential pressure gauges and much, much more. We cover all markets including wastewater, petrochemical, HVAC, plumbing, food & beverage as well as many others. Our pressure gauges and thermometers have a 5-year warranty, while all other products carry a standard 1-year warranty.$$$
LenzDayton, OH | 937-277-9364
Since 1946, Lenz has been manufacturing quality products including pressure gauges-stainless steel, liquid filled pressure gauges and much more. We provide fluid power solutions to companies of all kinds. Our newest products include the MC-20 indicating gauge, plus three sight gauges.$$$
A differential pressure gauge's components are housed in a metal enclosure; materials include stainless steel, cast iron, bronze, brass and aluminum. The windows are usually double-strength glass. Specific pressure gauges have additional materials such as plastic or rubber. Differential liquid pressure gauges are themselves filled with certain liquids including oil, glycerin and silicone. Pressure gauges are often used in tandem with protective accessories like shutoff valves.
Other accessories include pipe coils, chemical seals and secondary valves to minimize condensation and to allow calibration against an external pressure source such as atmospheric pressure. Differential pressure gauges have two inlet ports that monitor the pressure in two separate vessels. These pressure gauges are used in applications where it is important to take two measurements and compare them, determining which vessel or system has the highest flow velocity, for example. Differential pressure gauges are utilized by manufacturing and industrial plants and companies.
Differential pressure gauges perform subtraction in order to indicate the difference between the two readings. This eliminates the need for an operator or computer system to watch two gauges and perform the math. It is fast and efficient to have the information immediately and constantly displayed in one location. There are three main types of differential pressure gauges: Bourdon, diaphragm and piston. The Bourdon gauge has two C-shaped or coiled tubes connected to the chambers or pipes where the pressures must be read.
When pressure increases, the tubes uncoil. The motion of the two tubes is registered and a mechanical linkage compares the readings. Diaphragm gauges use two hermetically sealed membranes that flex in accordance with the pressure. The ports of the membranes are open to each other to compare pressures.
Piston type differential pressure gauges are also called deadweight testers because they counterbalance the pressure of a fluid with a solid weight or spring. As is the case with all three kinds, the difference is measured by a sensor and indicated on the gauge. The results may be displayed as analog, such as a needle on a dial, or they may be digital with numbers on a LED panel.