GlobalSpec has asked its users about the latest design trends and features related to Check Valves. They have also shared their product applications and tips on how to buy and use these products.
See the entire survey


Q:
What are some of the applications you have used check valves for?
26 answers
Answers:
To allow self tensioning assemblies, with a spring maintaining contact between the tensioning bolt and the shoe, such that when thermal expansion occurs, the mechanical resistance through contact is maintained. The hydraulic cylinder allows this expansion process, but on shock loading will present a firm resistance. When the shock load dissipates, the check valve releases allowing slow acting flows in both directions.
~Steve B, Engineering Consultant, Barnetby, UK
Sterile oxygen injection to fermenters, inline sulfuric acid injection, hypochlorite inline injection, sterile air, high pressure DI seal water, sanitary process, utilities steam, chilled, cooling, pump discharge
~David F, Project Manager, San Diego, CA
Refinery storage tank, Floating Roof center sump drain, connected to flexible hose inside tank and then connected to exterior nozzle and drained via attached piping.
~Rocky S, Design Engineer, Irvine, CA
Discharge check valves for large centrifugal natural gas compressors used in conjunction with the surge avoidance system.
~Robert W, Process Engineer, San Diego, CA
Pumping systems for water, solids laden water and sludge in the water and waste water industry.
~Bob C, Design Engineer, Sheffield, UK
To limit water hammer over pressures in steel water pipelines following pump trips.
~Nic T, Research & Development, Johannesburg, South Africa
HOT WATER RETURN SYSTEMS,SEWER BACK-UP PREVENTION, THERMOSTATIC MIXING VALVES
~Architect/Builder/Contractor, West Chicago, IL
At the inlet and outlet of a screw compressor At the outlet of process pumps.
~Technical Support/Services, Zwijndrecht, Belgium
Check valve failures that have resulted in personal injury and costly damages
~Ed C, Engineering Consultant, Houston, TX
Reverse flow in discharge line pumps, process lines control reverse flow
~Alfredo Rendueles, Engineering Consultant, Maracaibo, Venezuela
Power Plants Refineries HVAC Food Processing Mining
~John B, Marketing/Sales, Carlsbad, CA
Pump, compressor, well head, pipeline applications
~Mark C, Marketing/Sales, Farmington, NM
Air pressure gauges, compression gauges gauges
~General Corporate Mgmt, Parma Hts, OH
Petroleum additive injection systems
~Research & Development, Auckland, New Zealand
Water systems, race car fuel systems
~Research & Development, Midland, TX
Irrigation and water supply projects
~Engineering, Consulting, PUNE, India
Transferring application
~Engineering, Other, Calamba, Philippines
Cleaning home exteriors
~Tom K, Purchaser, Leitchfield, Grayson
Power plant pipe work
~Ken Wong, Mechanical designer, Sydney, Australia
Steam, hidrocarbons.
~Technical Support/Services, Ing White, Argentina
Water, oil & air
~Garth H, Technical Support, Mariposa, CA
Pump discharge
~Other, Sioux Falls, SD
Water systems
~Research & Development, Midland, TX
Sump pump
~Engineering, Other, Fort Wayne, IN
Design
~Engineering, Process/Production, Moscow, Russia
Auto
~St. Petersburg, FL

Top
Q:
Please share with us any “non-standard” applications that check valves have been used for.
9 answers
Answers:
PSV's (using spring values of checks as pressure safety valve release points in tubing (1/2") lines and sterilizers Create back pressure for diaphragm pumps (reseat balls on pump) Venting of gases on seal pots (floating balls, lighter that water will float and seat when water fills). Installing well upstream away from injection site to keep check valve clean yet use the non compressibility factor of the fluid to enable hard seating. Back Flow preventers and testing (standard, however special engineered check valve installation with test cocks and procedures to confirm operation)
~David F, Project Manager, San Diego, CA
The old application in hydraulic rams (pumps) should be re-looked at using computational fluid dynamic (CFD) modelling
~Nic T, Research & Development, Johannesburg, South Africa
6" pump discharge flowing right into a 12" check. 2 were destroyed in less than 30 days. Engineering Anyone???!!!
~Mark C, Marketing/Sales, Farmington, NM
Inserted the wrong way round in a vent pipe they act as an air release valve.
~Bob C, Design Engineer, Sheffield, UK
Sorry, I have not used check valves for non-standard applications.
~Alfredo Rendueles, Engineering Consultant, Maracaibo, Venezuela
Direct application of 12% bleach
~Tom K, Purchaser, Leitchfield, Grayson
Standard? Relative to what?
~Robert W, Process Engineer, San Diego, CA
Post tensioning lines
~Steve B, Engineering Consultant, Barnetby, UK
Hot oil
~St. Petersburg, FL

Top
Q:
Do you know of any disastrous mistakes that occurred due to the incorrect usage of check valves?
9 answers
Answers:
Beer getting into steam system and into boiler feed water, foaming and carry over in steam systems. Entire header needed to be isolated (10") to repair 3/8" check valve (no isolation, not correct materials).
~David F, Project Manager, San Diego, CA
Manufacturer finished product with flow arrow in the wrong direction. If you think every valve is QA'd, think again. Do your own checking and double checking. The life you save may be your son's.
~Mark C, Marketing/Sales, Farmington, NM
Twin plate spring return check valves placed in wrong location such that turbulence in the media caused the valve to "chatter" and ultimately self destruct.
~Bob C, Design Engineer, Sheffield, UK
Undersized load stopping circuits, where connections have underperformed and hydraulic fluid has been lost with loss of load control.
~Steve B, Engineering Consultant, Barnetby, UK
Nope. I always use quality valves from reputable manufacturers with a history of reliability in the industry.
~Rocky S, Design Engineer, Irvine, CA
Many: fatalities, brain injuries, fires, flooding, explosions, and uncontrolled processes.
~Ed C, Engineering Consultant, Houston, TX
Installed the wrong way round (in reverse)
~Nic T, Research & Development, Johannesburg, South Africa
Not at this time
~Alfredo Rendueles, Engineering Consultant, Maracaibo, Venezuela
Failure
~Garth H, Technical Support, Mariposa, CA

Top

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