8 Selection Criteria for Choosing Differential, Pressure, or Temperature Switches

When selecting differential pressure switches, pressure switches, or temperature switches there may be more than one choice, so the lower cost option is usually the best choice. There are some general guidelines for considering cost. For instance, in general a NEMA 7 rated switch will cost more than a NEMA 4 rated switch, a stainless steel housing will cost more than a die cast aluminum or brass housing, and a dual chamber design more than the standard housing.
Here are 8 Selection Criteria for Choosing Differential Pressure or Temperature Switches
Does the applications require an Explosion Proof (NEMA 7) housing or a Watertight (NEMA 4) housing?Do you need single or dual set points?Do you need fixed or adjustable dead band?Do you need an adjustable set point switch or a factory set only switch (this step is only for Pressure Switches)?Select the appropriate switch model listed in the step 5 boxes in the pressure, differential pressure or temperature switch selection charts. This sele…

Industrial, Sanitary, Marine, and Specialty Valves

PBM is a leading producer of dependable, high quality valves for the Chemical & Paint, Food &
Beverage, Marine, NQA-1 Qualified, Pharmaceutical, Energy, Paint & Resin, Pulp & Paper, Cryogenic, Personal Care, and Steel industries.

INDUSTRIAL VALVES 2-Way Ball Valves, NSI Ball Valves, Tank Bottom Valves, Trunnion Mounted, Diverter Port Ball Valve, Multi-Port Ball Valves, Control Valves

BPE COMPLIANT SANITARY VALVES Clean Steam Valves, Self Cleaning Ball Valves, 2-Way Ball Valves, Tank Bottom Valves, Diverter Port Ball Valve, Multi-Port Ball Valves, Pinch Valves, Spray Ball Valves

SPECIALTY VALVES Marine valves, Check Valves, Cryogenic Valves, Instrument Valves, Manifold Assemblies, NQA-1 COMPLIANT, Radial Diaphragm, Rising Stem Sampling
DOWNLOAD THE PBM VALVE SOLUTIONS GUIDE FROM THIS TRI-STATE WEB PAGE Tri-State Technical Sales can assist you in applying the ideal PBM valve for your application. Contact them by calling 610-647-5700 or visit their web site at https://tris…

What Are Flame and Detonation Arresters, Pressure & Vacuum Relief Valves, and Blanket Gas Regulators?

PILOT OPERATED RELIEF VALVES Pilot operated relief valves serve the same primary purpose as pressure/vacuum relief valves, but with better performance characteristics than weight or spring loaded valves. Lower leakage and better flow performance make a pilot operated valve the solution when the focus is product conservation, expanded tank working pressure range, and reduced fugitive emissions. A pilot operated relief valve pro-vides the maximum available leakage control technology as specified in the Clean Air Act of 1990.

PRESSURE/VACUUM RELIEF VALVES Pressure/vacuum relief valves are protection devices typically mounted on a nozzle opening on the top of a fixed roof atmospheric storage tank. Their primary purpose is to protect a tank against rupture or implosion by allowing the tank to breathe, or vent, when pressure changes in the tank due to normal operations.

BLANKET GAS REGULATORS Blanket gas regulators can provide both pressure and fire protection for storage tanks by supplying a…

Procedures for Installing Thermon Electric Heat Tracing

Thermon manufactures the widest variety of electric heating cables and control systems in the world. Their products cover the application requirements and demands for any heat tracing system.

This video describes the installation of Thermon trace heating systems in typical piping applications and are suitable for use with Thermon flexible trace heating products.  These instructions are not intended for mineral-insulated (MI) trace heaters. Instructions and documentation for other products and applications may be found at

Tri-State Technical Sales

Why Its a Good Idea to Use Instrumentation Manifold Valves: Get This 9 Page White Paper

Pressure spikes above the pressure instrument capabilities can cause permanent damage to mechanical and electrical components. Or worse, injury can occur to personnel from unintentional pressurized systems. With people, processes and profits in jeopardy, manifold valves are essential in pressure applications. From safety to instrument protection, manifold valves are used to isolate, control, bleed and calibrate pressure instruments without process interruption. Manifold valves are used with pressure gauges, pressure switches, pressure transducers and transmitters. The most common manifold valves are direct or remote mount. Depending on the application one type can significantly improve the system performance over the other. For example, the direct mount valve manifolds are tailored to improve efficiency and to reduce energy costs. Shorter path flows reduce pressure drops and heat fluctuations, improving the overall energy efficiency of a system. In contrast, remote valve manifolds ca…

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US Power Grids, Oil and Gas Industries, and Risk of Hacking

A report released in June, from the security firm Dragos, describes a worrisome development by a hacker group named, “Xenotime” and at least two dangerous oil and gas intrusions and ongoing reconnaissance on United States power grids.

Multiple ICS (Industrial Control Sectors) sectors now face the XENOTIME threat; this means individual verticals – such as oil and gas, manufacturing, or electric – cannot ignore threats to other ICS entities because they are not specifically targeted.

The Dragos researchers have termed this threat proliferation as the world’s most dangerous cyberthreat since an event in 2017 where Xenotime had caused a serious operational outage at a crucial site in the Middle East. 

The fact that concerns cybersecurity experts the most is that this hacking attack was a malware that chose to target the facility safety processes (SIS – safety instrumentation system).

For example, when temperatures in a reactor increase to an unsafe level, an SIS will automatically start …