News & Technical Articles

July 09, 2026 • 15 min read

Pressure relief and safety valve guide — conventional, balanced bellows and pilot-operated types; API 520/521/526 sizing, set pressure, overpressure and blowdown, backpressure limits, orifice letters D–T, and selection f…

July 08, 2026 • 13 min read

Sewage and wastewater pump guide — submersible, dry-pit and self-priming types; vortex, single-channel, multi-channel, grinder and chopper impellers; solids passage, ragging and clogging prevention, wet well design and p…

July 07, 2026 • 14 min read

NFPA 20 fire pump guide — horizontal split case, vertical inline, end suction and vertical turbine types; the churn / 100% / 150% performance curve, jockey pumps, controllers, diesel vs electric drivers, pressure setting…

July 06, 2026 • 13 min read

Positive displacement pump guide — rotary types (gear, screw, lobe, vane, progressive cavity) and reciprocating types (piston, plunger, diaphragm). How they differ from centrifugal pumps, viscosity handling, relief valve…

July 05, 2026 • 13 min read

Air operated double diaphragm (AODD) pump guide — working principle, diaphragm and body materials, run-dry and self-priming capability, applications for slurries, acids and shear-sensitive fluids, plus selection and trou…

July 04, 2026 • 14 min read

Check valve types explained — swing, lift, ball, dual plate (wafer), tilting disc, and nozzle. How each works, water hammer prevention, cracking pressure, installation orientation, and a clear selection guide with compar…

July 03, 2026 • 13 min read

Globe valve vs gate valve compared — throttling vs isolation, pressure drop, sealing, cost, and applications. When to use each, why gate valves must never throttle, plus a clear selection table and decision guide.

July 02, 2026 • 13 min read

Butt weld, socket weld, and threaded pipe connections compared — pressure, pipe size, cost, corrosion, and vibration. When to use each joint type, ASME standards, and a clear selection table for your piping class.

July 01, 2026 • 13 min read

ASTM A335 chrome-moly alloy steel pipe explained — grades P5, P9, P11, P22, P91, P92 compared. Chemical composition, temperature limits, welding, PWHT, and applications for power and refinery service.