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Gases industry review--Q & A.
Question: While discussing the specifications of a manifold with my distributor, he recommended that the manifold befitted with both station valves and check valves at the cylinder connections. Isn't this kind of a belt and suspenders recommendation or, worse yet, is he just trying to fatten-up the sale?
Answer: No! There are practical safety and operational reasons for building a manifold with both station valves and pigtail check valves. For example, in the event of a ruptured pigtail, the station valves provide a means of isolating the station with the bad pigtail so that the entire manifold is not discharged. The check vanes provide both safety and purity benefits. Check valves keep air from entering the pigtails and the manifold during cylinder change outs. Check valves also keep the manifold from discharging its contents if someone disconnects prematurely or fails to close a station valve. In any event, a manifold should always have either station vanes or check valves.
As far as the fatter sale is concerned, a manifold with station valves and check valves has ...
- Check valves for submersible installations: the fundamentals of pumped water...
- Magazine article from: National Driller Pelikan, Robert June 1, 2008 700+ words
Check valves permit water flow in one direction only...Some submersible pumps have built-in check valves, and are suitable for operation without...application and installation. Types of Check Valves Spring-loaded, stem or cage poppetstyle...
- Effect of evaporator section lengths and working fluids on operational limit of...
- Magazine article from: American Journal of Applied Sciences Meena, P. Rittidech, S. Tammasaeng, P. January 1, 2009 700+ words
...or more direction-control one-way check valves in the loop so that the working fluid...studies the oscillating heat-pipe with check valves. It was found that the CHOHP/CV...looped oscillating heat-pipe with check valves (CLOHP/CV). It was found that the...
- Understanding check valves: sizing for the application, not the line...
- Magazine article from: Water World Shorts, Mike May 1, 2007 700+ words
Check valves are probably the most misunderstood valves ever invented. If you mention check valves to most plant personnel, the typical response...internals or re-piped the system to avoid check valves. In other words, these valves are the...
- Check valves: Oak Ridge's new diagnostics.
- Magazine article from: Mechanical Engineering-CIME Haynes, Howard D. May 1, 1991 700+ words
Check valves are used extensively in nuclear plant safety...resulting from instability (flutter) of check valves under normal plant operating conditions. During the last five years, check valves have received increased attention by the...
- Effect of evaporator lengths and ratio of check valves to number of turns on...
- Magazine article from: American Journal of Applied Sciences Rittidech, S. Meena, P. Terdtoon, P. March 1, 2008 700+ words
...looped oscillating heat-pipe with check valves (CLOHP/CV) in Fig. 1. is a very...looped oscillating heat-pipe with check valves (CLOHP/CV). Akachi et al. (1...loop oscillating heat-pipe with check valves (CLOHP/CV). This type is a closed...
- Check valves.(Fluid Power)
- Magazine article from: Design News June 7, 2004 700+ words
Barbed and threaded The company has released information about three of their lines of check valves: barbed check valves, threaded check valves, and duckbill check valves. The barbed check valves are manufactured with a polished barb...
- Diaphragm Check Valves are manufactured from Corzan[R] CPVC.(Plast-O-Mastic...
- Magazine article from: Product News Network June 11, 2004 700+ words
Corzan Series CKM Check Valves prevent unwanted and potentially dangerous reverse...Inc. now offers a complete line of diaphragm check valves manufactured of Corzan[R] CPVC. Check valves are used for preventing reverse flow in liquid...
- Silent Check Valves come in flanged and wafer syles.(Spence Strainers...
- Magazine article from: Product News Network July 22, 2004 700+ words
...steel, and stainless steel, SSI silent check valves mount vertically or horizontally to...steel flanged and wafer style silent check valves, ANSI Class 125, 150 and 300 lbs...cost are of major concern, SSI silent check valves can be mounted vertically or horizontally...
- Swing Check Valves suit dry bulk transfer carriers.(Dixon Bayco Introduces...
- Magazine article from: Product News Network December 23, 2004 700+ words
Line of 3 and 4 in. swing check valves protects food-grade and dry...line of 3- and 4-inch swing check valves for complete flow reversal prevention...degrees]F. Dixon Bayco's swing check valves provide low-resistance and true...
- Slip-In Check Valves eliminate external leak points.(INSERTA ICS Slip-In Check...
- Magazine article from: Product News Network September 29, 2004 700+ words
ICS Slip-In Check Valves have compact design that controls...INSERTA ICS Slip-In Check Valves can be inserted in manifolds, subplates...points associated with line mounted check valves. These check valves can control...