Posts Tagged ‘Ballvalve’
Severe Service & Dirty Service
October 10th, 2018 by Amanda Schumann
Information on severe service and dirty service on quarter turn ball valves
Product Highlight – APV-BVF100-QF Trunnion Ball Valve
August 9th, 2018 by Amanda Schumann
Product highlight on APV BVF100-QF Trunnion Ball Valves
A CONTENTIOUS ISSUE
May 2nd, 2018 by Amanda Schumann
Information regarding Sealant Injection facilities on Trunnion Mounted Ball Valves
DOUBLE BLOCK AND BLEED VALVES – DUAL VALVE
February 28th, 2018 by Amanda Schumann
A Technical Guide to Double Block and Bleed Valves
SLFSBV01 Floating Ball Valve 150 to 600 Class
February 7th, 2018 by Amanda Schumann
Information on SLFSBV01 Floating Ball Valves
EMERGENCY SEALANT INJECTION ON TRUNNION MOUNTED BALL VALVES
November 8th, 2017 by Amanda Schumann
Be careful with trunnion mounted ball valves 100mm (4”) and under and in reduced bore 150mm (6”) and under as many manufacturers cannot put a sealant injection directly onto each seat such as in the photo shown above (RHS). They can only fit a sealant injection to the middle of the body (photo LHS). Consequently […]
Explosive decompression of o-rings in trunnion ball valves
August 9th, 2017 by Amanda Schumann
Many manufacturers and operators in the oil and gas industry have leakage problems with elastomer seals, especially when a drop in pressure takes place. This primarily occurs in sealings which create a barrier against gaseous media if highly pressurised gas falls to a very low pressure level within a very short period of time. The […]
Beginner’s traps painting ball valves
February 27th, 2017 by Amanda Schumann
Even if you’re ordering from a quality valve manufacturer, they often sub contract out special painting of the valves. Typical problems involve not taping up the stem area or indeed the bore area properly or the tape falling off. Sandblasting residue can ingress into the stem area or into the seat area. Initially this may […]