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Hey! Greetings! I was going through catalogues of floating ball valve manufacturers and found a confusing thing that most of the manufacturers were offering floating 3-piece ball valve in smaller sizes (2" and less) in higher pressure class (800 and 900) but in bigger sizes (21/2", 3" and 4")...

Hey Greetings! I was studying ISO 5211:2001 "Industrial valves - Part-turn actuator attachment" standard and I am thinking how much importance dimension 'h1' holds in recent valve market? Is it necessary to provide that much of depth on valve top mounting pad because most of the actuators I have...

hey Greetings! I am a bit confused here. I have bought 2 three-piece ball valves with same pressure class and same features but different manufacturers. One is smooth to operate while other requires more efforts to operate it in same line. Why is that happening? Two reasons I can think of: 1...

hey I read this information on internet that when a valve is said fire safe it means the design is fire safe and it is not fire tested while if it is said by the manufacturer that valve is fire tested then only it has been 100% fire tested. So my doubt is while the maunfacturer writes in catalog...

Hello Can anyone suggest me any standards which are used in valve industry to do incoming material inspection for the ball valve bought outs? For example, our bought outs include everything except valve body so we are confused which inspection standard we should choose in order to provide best...

Hey I got a question. I can't understand why my supplier is giving me a bit different bore when I ordered a full bore ball valve design? I got a bore of 11.6 mm in a 1/4"(DN8) full bore ball valve, 12.5 mm in a 3/8"(DN10) full bore ball valve and 24 mm in a 1"(DN25) full bore ball valve. And in...

Hey Greetings! I'm in a confusion regarding something I read on internet. Can anyone explain me how a wafer type butterfly valve safeguards against bi-directional pressure differential to avoid any back flow in systems that have been manufactured for uni-directional flow? I mean I know wafer...

Hey Greetings! I got a 1" reduced bore and 1" full bore 3-piece ball valve. Now if I just concentrate on middle main body piece of both the valves the difference I observed was due the size of the ball (obviously due to difference in bore). Now my question is if the ball outer diameter is kept...

Hey Greetings! Firstly I have bought a Class 800 Socket welded three piece ball valve of CF8M material from a local purchaser. Now I wanted to check if the purchaser has done proper testing of the valve according to API 598. And when I referred the standards the shell hydrostatic testing...

For ball valves, What range of temprature and pressure can be called high or low comparatively? For example, Valves opetrating at 80 bars and 300C can be called workking at high temprature & pressure range or not! Like this For ball valve, which temprature range and pressure range can be...

What size range of gate valve is widely used for WOG applications? Any suggestions?

For 1" to 4" range of gate valves( Body, Bonnet, Gate) which casting process should be prfered? Sand casting or insvestment casting? why?

Hey, subject says the query! This is what I know that full port are mostly used where pigging in pipeline is required while reduced port are used where negligible pressure drop is not of concern. And also I have observed reduce port are less costly compared to same size of full port. Is the...

hey I need some expert comment on: "why 3-piece ball valve end caps(threaded ends) of some companies have octagon design while some companies provide hexagon design? Looking on the function aspect,I thought the shape has to be provided to have a grip for the wrench but then question arises why...