What are flush bottom valves?

What are flush bottom valves?
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1 Answer

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Answer: Special type of valves used to drain out the piping, reactors and vessels, attached on pad type nozzles.
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Related questions

What are types of flush bottom valves?

Description : What are types of flush bottom valves?

Last Answer : Answer: Valves with discs opening into the tank and valves with disks into the valve.

What are types of gate valves?

Description : What are types of gate valves?

Last Answer : Answer: Solid plane wedge, solid flexible wedge, split wedge, double disc parallels seats, double disc wedge, single disc single seat gate or slide, single disc parallel seats, plug gate valve.

What are port types for gate valves?

Description : What are port types for gate valves?

Last Answer : Answer: Full port and reduced port. Default is reduced bore. Full port has to be specified in bom.

Where diaphragm valves are used?

Description : Where diaphragm valves are used?

Last Answer : Answer: Used for low pressure corrosive services as shut off valves.

What are non-slam check valves?

Description : What are non-slam check valves?

Last Answer : Answer: Swing check valve, conventional check valve, wafer check valve, tilting disc check valve, piston check valve, stop check valve, ball check valve.

Why ball valves are normally flanged?

Description : Why ball valves are normally flanged?

Last Answer : Answer: Because of soft seat PTFE which can damage during welding.

What pressure tests are carried out on valves?

Description : What pressure tests are carried out on valves?

Last Answer : Answer: Shell-hydrostatic, seat-hydrostatic, seat-pneumatic

What materials are used for construction of valves?

Description : What materials are used for construction of valves?

Last Answer : Answer: Cast iron, bronze, gun metal, carbon steel, stainless steel, alloy carbon steel, polypropylene and other plastics, special alloys.

What are special valves?

Description : What are special valves?

Last Answer : Answer: multi-port, flush bottom, float, foot, pressure relief, breather.

What are non-return valves?

Description : What are non-return valves?

Last Answer : Answer: check valve.

What are regulation valves?

Description : What are regulation valves?

Last Answer : Answer: Globe, needle, butterfly, diaphragm, piston, pinch.

What are isolating valves?

Description : What are isolating valves?

Last Answer : Answer: Gate, ball, plug, piston, diaphragm, butterfly, pinch.

What are functions of valves?

Description : What are functions of valves?

Last Answer : Answer: Isolation, regulation, non-return and special purposes.

What pressure tests are carried out on valves?

Description : What pressure tests are carried out on valves?

Last Answer : Answer: Shell-hydrostatic, seat-hydrostatic, seat-pneumatic

What materials are used for construction of valves?

Description : What materials are used for construction of valves?

Last Answer : Answer: Cast iron, bronze, gun metal, carbon steel, stainless steel, alloy carbon steel, polypropylene and other plastics, special alloys.

What are special valves?

Description : What are special valves?

Last Answer : Answer: multi-port, flush bottom, float, foot, pressure relief, breather.

What are non-return valves?

Description : What are non-return valves?

Last Answer : Answer: check valve,

What are regulation valves?

Description : What are regulation valves?

Last Answer : Answer: Globe, needle, butterfly, diaphragm, piston, pinch.

What are isolating valves?

Description : What are isolating valves?

Last Answer : Answer: Gate, ball, plug, piston, diaphragm, butterfly, pinch.

What are functions of valves?

Description : What are functions of valves?

Last Answer : Answer: Isolation, regulation, non-return and special purposes.

What are the types of bonnets?

Description : What are the types of bonnets?

Last Answer : Answer: Bolted bonnet, bellow sealed bonnet, screwed on bonnet, union bonnets, A U-bolt and clamp type bonnet, breech-lock bonnet, pressure seal bonnet

What is lantern ring?

Description : What is lantern ring?

Last Answer : Answer: It’s a collection point to drain off any hazardous seepage or as a point where lubricant can be injected; it is in the middle of packing rings.

How to close a gate valve?

Description : How to close a gate valve?

Last Answer : Answer: Turn the hand-wheel in clockwise direction.

What is double disc globe valve?

Description : What is double disc globe valve?

Last Answer : Answer: Has two discs bearing on separate seats spaced apart, on a single shaft, for low torque, used for control valves.

Where WYE body globe valve is used?

Description : Where WYE body globe valve is used?

Last Answer : Answer: In line ports with stem emerging at 45 degree, for erosive fluids due to smoother flow pattern.

Where plug type disc globe valve is used?

Description : Where plug type disc globe valve is used?

Last Answer : Answer: For severe regulating service with gritty liquids such as boiler feedwater and for blow off service.

What are types of globe valve?

Description : What are types of globe valve?

Last Answer : Answer: Angle globe valve, plug type disc globe valve, WYE-body globe valve, composite disc globe valve, double disc globe valve.

What are characteristics of globe valve stem?

Description : What are characteristics of globe valve stem?

Last Answer : Answer: Always rising design, with disk nut at the lower end and handwheel at upper end.

What are globe valve disk types?

Description : What are globe valve disk types?

Last Answer : Answer: Flat faced type for positive shutoff, loose plug type for plug renewal or needle type for finer control.

What are globe valve port types?

Description : What are globe valve port types?

Last Answer : Answer: Full port: More than 85% of bore size, Reducer port: One size less than the connected pipe.

How to install a globe valve?

Description : How to install a globe valve?

Last Answer : Answer: Globe valve should be installed such that the flow is from the underside of the disk, Usually flow direction is marked on the globe valve.

What is needle valve?

Description : What is needle valve?

Last Answer : Answer: Full pyramid disc, same design as globe valve, smaller sizes, sw or threaded, flow control, disc can be integral with stem, inside screw, borged or barstock body and bonnet, manufacturers standard.

What is pinch valve?

Description : What is pinch valve?

Last Answer : Answer: Similar to diaphragm valve, with sleeves of rubber or PTFE, which get squeezed to control or stop the flow, Cast iron body, for very low service pressures like isolation of hose connections, manufacture standard.

What is dimensional standard for plug valve?

Description : What is dimensional standard for plug valve?

Last Answer : Answer: API 599.

What are eccentric plug valve?

Description : What are eccentric plug valve?

Last Answer : Answer: Off center plug, corrosive and abrasive service, on off action, moves into and away from seat eliminating abrasive wear.

What are permasil plug valve?

Description : What are permasil plug valve?

Last Answer : Answer: Plug valves with Teflon seat instead of sleeves, for on-off applications, can handle clean viscous and corrosive liquids, Graphite seat for high temperature applications. Drip tight shut off not possible.

What are Teflon sleeved plug valve?

Description : What are Teflon sleeved plug valve?

Last Answer : Answer: PTFE sleeve between plug and body of valve, low turning effort, minimum friction, temperature limitation, anti static design possible.

What is pressure balanced plug valve?

Description : What is pressure balanced plug valve?

Last Answer : Answer: With holes in port top and bottom connecting two chambers on top and bottom of plug, to reduce turning effort.

What are inverted plug design valve?

Description : What are inverted plug design valve?

Last Answer : Answer: Plug valve with taper portion up of plug. For 8” and higher size.

What are ventury pattern plug valve?

Description : What are ventury pattern plug valve?

Last Answer : Answer: Change of section through the body throat so graded to have ventury effect, minimum pressure loss.

What are short pattern plug valve?

Description : What are short pattern plug valve?

Last Answer : Answer: Valves with face to face dimension of gate valve, as a alternative to gate valve.

What is regular pattern plug valve?

Description : What is regular pattern plug valve?

Last Answer : Answer: Rectangular port, area almost equal to pipe bore, smooth transition from round body to rectangular port, for minimum pressure loss.

What are three patterns of plug valve design?

Description : What are three patterns of plug valve design?

Last Answer : Answer: Regular pattern, short pattern and ventury pattern.

What is metal seated lubricated plug valve?

Description : What is metal seated lubricated plug valve?

Last Answer : Answer: A plug valve with no plastic material, where grease is applied to contacting surfaces for easy operation.

What are uses of four way valve?

Description : What are uses of four way valve?

Last Answer : Answer: Reversal of pump suction and delivery, By pass of strainer or meter, reversal of flow through filter, heat exchanger or dryer.

What are the uses of three-way valve?

Description : What are the uses of three-way valve?

Last Answer : Answer: Alternate connection of the two supply lines to a common delivery vise versa, isolating one safety valve, division of flow with isolation facility.

What is float valve?

Description : What is float valve?

Last Answer : Answer: Used to control liquid level in tanks, operated by float, which rises with liquid level and opens the valve to control water level. It can also remove air from system, in which case, air flows ... valve, float inside valve raises to close the valve and stop flow of water. Used in drip legs.

What is foot valve?

Description : What is foot valve?

Last Answer : Answer: Valve used to maintain a head of water on the suction side of sump pump, basically a lift check valve with integrated strainer.

What is safety valve?

Description : What is safety valve?

Last Answer : Answer: Rapid opening (popping action) full flow valve for air and other gases.

What is relief valve?

Description : What is relief valve?

Last Answer : Answer: Valve to relieve excess pressure in liquids in situations where full flow discharge is not required, when release of small volume of liquid would rapidly lower pressure.