Last updateThu, 06 May 2021 8pm

Stop Check Valves

Stop check valves are vital to several industries to protect boilers and other equipment.

Introduction to Pressure Relief Devices - Part 1

When the pressure inside equipment such as boilers or pressure vessels increases beyond a specified value, the excess pressure may result in a catastrophic failure. To avoid that calamity, pressure relief devices are used at predetermined set pressures to protect the equipment by relieving the excess pressure (Figure 1).

Flashing and Cavitation

15 sum flash introSome of the following questions may seem ­unrelated, but they all involve key concepts that explain the sometimes-misunderstood ­phenomena of flashing and cavitation:

Mechanical and Compression Packing

15 spr packingsMechanical packing dates back more than 5,000 years when horse hair was braided and coated with animal fat for lubrication and additional sealing ­characteristics. Mechanical and compression packing advanced tremendously in the years since then, but especially so in the past 30 years as environmental concerns about valve leakage and U.S. Environmental Protection Agency (EPA) rules have come to the forefront.

The Expanding Reach of Plastic Valves

13 spr B2B introAlthough plastic valves are sometimes seen as a specialty product—a top choice of those who make or design plastic piping products for industrial systems or who must have ultra-clean equipment in place—assuming these valves don’t have many general uses is short-sighted. In reality, plastic valves today have a wide range of uses as the expanding types of materials and good designers who need those materials mean more and more ways to use these versatile tools.

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