SEPCO

Friday Featured Product: SEPCO 500 graphite sheet. 98% pure graphite on a 0.002" 316 SS insert, no binders to cook out, rated to 932°F. Bolt it up in a star pattern, passes at 30/60/100%, then circular passes at 100% until no nut turns. bit.ly/4stSVJN #Gaskets

Packing needs flush water. Mechanical seals need a liquid film. Dry powder offers neither. An air seal swaps the liquid for clean air above vessel pressure. Losing air mid-batch is what fouls one. What it needs to run, and when not to use one: bit.ly/4yJEpPJ

New isolator leaking oil? Check these before you pull it: 1. Expulsion port at 6 o’clock 2. Oil level below the isolator drain 3. Rotor O-ring not cut on a keyway How the EXP works and where installs go wrong: bit.ly/4i4hlWW #BearingProtection #Reliability

Single-spring seals are handed. With the right rotation, the spring winds tighter on the shaft and drives the face. Run it backward and the spring unwinds, loses grip, and the rotating face slips. Confirm shaft rotation before you order, not after it leaks.

Plenty of seal failures start on the pump curve. Run left of BEP and radial load climbs, the shaft deflects, and the faces see it every revolution. Throttled discharge valves and oversized pumps put you there. Check the operating point before changing seal designs.

Friday Featured Product: SEPCO CGS Cartridge Grease Seal. A single cartridge seal with a grease barrier cavity that keeps product from reaching atmosphere—no flush water, no barrier system. Not a substitute for a dual seal in toxic service. bit.ly/4dRCjpn

Wireless vibration sensors catch bearing wear weeks out. Mechanical seals rarely give that warning—they fail when conditions change: dry running, low flow, lost flush. Monitor flush flow, gland temperature, and operating point, not just the pump. #PumpReliability

Tuesday Tip: Check soft foot one bolt at a time. Loosen a foot with a dial indicator on it; more than 0.002 in. of rise is soft foot. If it goes away with the pipe disconnected, it’s induced soft foot. Fix the piping, not the shims. Recheck after torque. #Alignment

A seal doesn't set pump pressure. It sees chamber pressure, and balance ratio decides how much reaches the faces. At 150 psi: about 105 psi face load unbalanced, 38 balanced. Gauge the chamber before you blame the seal. bit.ly/4dFXXgi #MechanicalSeals

Friday Featured Product: SEPCO HydraLoad. A bearing-grade bushing in the stuffing box steadies the shaft so packing lasts longer. The lantern ring is separate: if it cracks or clogs, replace the ring, not the assembly. bit.ly/3VzgvZz #PumpReliability

Many "seal failures" trace back to how the seal went in: setting clips left on, gland nuts tightened unevenly, faces handled bare-handed. Checklists catch some of it. Hands-on training and honest failure codes catch more. bit.ly/4yipcEU #MechanicalSeals

Annual SEPCO steak cookout today: ribeyes, baked potatoes, a full salad bar, and dessert. Thanks to the people who build, test, and ship our seals and packing every day, and to Matt, Jean, and Bobby for making sure everything was perfect. #SEPCO #Manufacturing

Hydrapulper pump at a tissue mill: seals lasting 1–2 weeks. Cause: an unbolted wet end and pipe strain moving the shaft. A SEPCO PSS air seal tolerates 0.062" TIR and unlimited axial movement. It's still in service today. bit.ly/3VJjkY4 #PulpAndPaper

Tuesday tip: seal faces that look like they ran dry may have been boiling. When seal chamber pressure falls below the fluid's vapor pressure at chamber temperature, the film flashes across the faces. Check vapor margin at measured temperature, not design temperature.

A flange that passes hydrotest and weeps two days later usually lost bolt load. The gasket didn't fail. Tighten in passes: 20–30%, 50–70%, then 100% in a cross pattern. Finish with circular passes at 100% until no nut turns. Lubricate threads and nut faces. #Gaskets

Only 10% of bearings ever reach their L10 life. 52% of the failures are oil contamination. Not load. Not alignment. Dirt and water getting into the housing. The EXP is a true non-contact isolator: dual expellers, nothing touching your shaft. bit.ly/3THzLTO

A hose that fails in a fire doesn't just leak. It feeds the fire. Pyrosleeve is silicone-coated braided glass, made in Alabaster. 1,900°F for 15 to 20 minutes. 9,500 cycles on the Wyzenbeck abrasion test. Self-extinguishing. 5/16" to 3-1/2" ID.

Torque is not clamp load. Most of what you put into a flange bolt goes to friction — under the nut face and in the threads. Only a fraction becomes bolt stretch, and stretch is what seals the gasket. Dry bolts and lubricated bolts at the same torque are two different joints.

Your IR gun assumes an emissivity of 0.95. Polished stainless is about 0.15. That gap is why the gland reads cool when it isn't. The error always runs low. Flat black tape on the gland, let it come to temperature, shoot the tape.

More seals die on Monday morning than on Friday afternoon. A pump that sat all weekend has settled solids in the chamber, a stagnant flush line, and in crystallizing service, crystals on the atmospheric side of the faces. Verify flush flow before the motor turns.