Valve Definition and 218 Threads

I am attempting to design a component to remotely control the throttle on a mini petrol powered ATV as a little project. Initially I have had the idea to adapt a standard cruise control unit to do the job but was wondering if anyone had any other suitable ideas? (Obviously this will not go out...

Folks, I have an application that will require an air inlet port to occasionally be exposed to water (splashing mostly), a simple splash guard will likely not work. Are there any off-the-shelf or simple solutions that anyone can think of that can be used for keeping the water from entering...

Hi all, I'm new to this forum, but have used it before for school. I'm currently working on my MS mechanical thesis which pertains to vortex rings in fluid. I was wondering if anyone had any good websites/suggestions for an electronically controlled valve with the following specifications...

I need to compute for the relief capacity (gpm or lb/hr) of a 10" rupture disc with relief valve set at 180psig. Vented out into the atmosphere. Assume fluid is water at 140F. I tried using ASME and API Equation but they give different answers. Can someone tell me the correct answer and what...

Hi, I'm looking for a standard (CGA, ANSI, ISI, etc.) which lays out requirements for the marking of pressure ratings on shut off valves (which aren't cylinder valves) in the USA. Does anyone know what it is or if it even exists? Any insights are much appreciated. Thanks! Blake J

Hi . I am modeling a sodium steam generator in Octave. I build a set of differential equations and solve them with Octave DAE solver. My model works just fine. Now i would like to start implementing controls but I am quite confused with P conroler output signal and with what it actually...

Hello guys, I want to study the temperature evolution of a gas in a vessel from 200 bar to 20 bar. I made the assumption the expansion is isentropic. However I have some trouble to represent the heat exchange between the wall and the gas. I used the energy conservation (transfer from a...

Hello, Im a student and I try to design a valve connected to a tank. However I have some troubles to define the phenomena. I have a pressurized tank with air at 100 bar and I would like to know the evolution of the flow rate through the opened valve. The valve outlet is at the atmospheric...

I am investigating the cause for malfunction of a solenoid water inlet valve (when de-energized, the valve fails to close and instead exhibits cyclic surging of water flow). 4 of the 6 bleed holes are blocked with debris, and I have concluded that this is what caused the valve to malfunction...

My boss has a boat load of extra PVC piping laying around the shop and I wanted to use it to make a pipe organ. I need a way to electronically open and close the connections from each individual pipe to the main air supply. I'm on a tight budget and I'll need to make 88 valves in total. I have...

Hello, How can one calculate the dimensions of valve shims in Gas pressure shock absorber? Desription- The valve shims are orifices to the fluid flow in the hydraulic damping system. The dimensions play a very vital role in the adjustment of compression and rebound of the damper. I have...

I would like to know whether it is ok to use 220V Solenoid Valve in a 230V Environment. This is the Valve I am taking about. This is the Circuit I am going to make with this. http://www.electroschematics.com/6161/power-switch-with-infrared-proximity-sensor/ Thanks in Advance :)

Homework Statement An automatic valve consists of a 225 X 225 mm square plate that is pivoted about a horizontal axis through A located at a distance h = 90 mm above the lower edge. Determine the depth (d) of the water for which the valve will open." Given: h = 90 mm, y = 225 mm *Answer...

Hi everyone, In a current project, I'm curious about the risk of silicone tube cold welding when used with a solenoid pinch valve, such as = http://cfnewsads.thomasnet.com/images/large/454/454667.jpg What is the likelihood silicone tube will cold weld at the pinch point, if the pressure is...

I am planning to custom build a water tank into which a household washer should discharge it's used water. I have estimated that a tank holding 60 ltrs would be sufficient. This quantity should be released into the building's drainage system within about an hour because the system is old and has...

Briefly, a solenoid valve utilizes a solenoid to move a soft iron core in such a way as to open/close an orifice to allow/inhibit flow of a fluid. I am a bit rusty on my E&M and I have a couple questions about this operation. 1) When a magnetic field is created using the solenoid, the soft...

Briefly, a solenoid valve utilizes a solenoid to move a soft iron core in such a way as to open/close an orifice to allow/inhibit flow of a fluid. I am a bit rusty on my E&M and I have a couple questions about this operation. 1) When a magnetic field is created using the solenoid, the soft...

I am having issues with solids building up in the 10” discharge ball valves on Mother Liquor Pumps that prevent operations from being able to close the valve. I have had a few discussions regarding ways to improve or eliminate this issue which have included insuring the valve is insulated/traced...

Hello, I am trying to build a high-speed X/Y cartesian robot which vacuums up defected parts from a moving conveyor. The end effector of the robot has a venturi vacuum integrated. Because the vacuum is constant, I need a Z-axis to go up/down for the end effector to get the defects otherwise...

Why is it that sometimes the 2 way valve is smaller than the size of the pipe ?

hi guys...can anyone tell me that whether v use only globe valve in steamline connections in common practice?

Is there a specific location (say top, bottom etc.) that a safety relieving valve is put on a pressure vessel? Say there's a tall refining separation column (operating above atmospheric pressure), where would logic (or codes) indicate that a pressure relief valve ought to be ideally placed...

Homework Statement A thick walled insulating chamber contains ##n_1## moles of helium gas at a high pressure ##P_1## and temperature ##T_1##. It is allowed to leak out slowly to the atmosphere at a pressure ##P_o## through a small valve. Show that the final temperature of the ##n_2## moles...

How exactly would you describe the principle of a valve for flow control? In a globe valve for example the fluid flows through valve seat and generally leaves the valve with the outlet diameter being the same as the inlet diameter. My original assumptions were that Bernoulli's principle...

I just watched a video by Koenigsegg engineers and came across this question. Why is camshaft the primary control of the engine valves? Using electronic controlled actuators would certainly benefit the engine in aspect of performance, but might increase the cost of production as well. People...

In vapor compression refrigeration, I know how to calculate the work done by the compressor (enthalpy at outlet - enthalpy at inlet), but I am lost on how to calculate the work done by the evaporator, condenser, and the expansion valve. For the evaporator and condenser, if I wish to have a...

Hi, I was wanting to insert 1 inch foam balls inside a container of ferrofluid, causing the foam ball to float. A normal one-way water valve would not let the ball through without any leakage (I believe), therefore I think that If i can build a valvue that consists of a ring of neodynium...

Hello, I'm Nate, and I'm looking to build a compressed-air engine. I'm using a pneumatic cylinder with a 3" bore and a 12" stroke. That was simple enough to find. What hasn't been simple to find is a manual valve large enough to actuate it. I've found small 5-way valves on ebay and amazon, but...

I have been looking at the basic operation of a heat pump. On these pumps there is an expansion valve. This valve is a narrow hole where the condensed working fluid is passing through, then evaporation happens in the low pressure side - after this hole. I assume this valve act as a resistance...

Hey! Yesterday I was on the Czech Physics Olympiad. There were many examples. To one, however, I did not invent anything, because I don't learn Hydrodynamics to much. I want to understand it better, so I want to ask you how you calculate it, please. I'm sorry, I did not give my progress here...

I want to know exactly why 16V engines produce more HP? Please explain in detail. What is the exact reason? Why usually 8 Valve engines produce more torque lower down the rev range?

Can somebody explain to me why the temperature gets colder when expanding through a turbine versus expanding through a valve. Please explain with equations.

I have to run a FEA analysis on a nozzle check valve body DN700... Its been to a professional engineer and he has completed the study so I am trying to do it myself to get to know the software better... I'm using PTC CREO 2 mechanica as the software... Attached find a picture of the valve...

I am trying to come up with a shape or design of a simple piston with holes that will allow fluid to flow in one direction better than the other. Very Simple shock design. I have tried tapered holes so as to speed up flow in one direction and it worked slightly but haven't quite found the...

Hi folks. I had a strange thing happen to me and I was wondering if some of you physics gurus could explain it to me. It's my understanding that gas escaping from a pressurized tank makes things cooler. In fact I recently had to empty my scuba tanks for transport and the valves did indeed ice up...

I was looking at 2 inch actuated valves. In the Indian market they cost around 12,000 rupees(~$220). I have a couple of car window control motors. I was thinking of building a valve with it. I would appreciate your thoughts on some simple design.

Hi there. I've been scouring google for a valve that will release a fluid (preferably a liquid) once 5psi has been reached. It must be within 100 x 40 x 40mm (the smaller the better). Has anyone any idea where to find a product like this? Many thanks. Andy

Hey, Just something i wanted to confirm, in a pipe system a booster pump is used to boost the water pressure. A accumaltor is postioned after the pump, a non return valve is required at the pump outlet. I believe the non return valve should be before the accumaltor but after the pump. Is...

I have a hand pump that I use to pump air out of things with and the plastic valves that I use keep failing eventually. Either from being under too much pressure, or from being under pressure for too long. I guess there's like a diaphragm in the valve that weakens and begins to leak. Here's an...

Hi everyone, I have to determine the size of safety valve for an air pressure vessel. I found in ASME and BS 5500 a procedure to calculate the size of safety valve, which relates the mass flow capacity to the: pressure, temprature, discharge area, s.v coefficient, and air parameters. This can...

Hello, I have abnormal situation on a site, there are installed 3 valves in parallel (cascade) in Fuel gas skid, upstream pressure of the valve is 30 bar, downstream pressure 25-26 bar, when 2 GTG starts up to load 40 MWt (100 %) the downstream pressure of the control valves decreses to 21 bar...

I set out to find out how many seconds it takes for a 4cylinder naturally aspirated diesel engine to complete 1 cycle(4 strokes): I considered a tata indica model max power:53.5PS@5000rpm therefore 5000 rev per min or 83.3 rev per sec now it takes 0.012 seconds to complete 4 strokes or 1...

Hi guys, I am looking for a small and light air valve that can be activated by the arduino platform and can run on batteries. Once the valve gets the “go”signal it needs to switch (speed doesn’t matter) from a closed to an open position. The pressure to handle is low, i.e. <2 bar. It only needs...

Hello; just need approximations here. 16 inch buttterfly valve with separate environments on each side. side one: clear water at about 8psi; side two: air at about 33 psi; Consider both pneumatic and electric actuatiion under ideal conditions.What is the approximate fastest time to open...

Hi. Situation: A pipe with a cut out so it will break when a shear force is exerted at the top of the pipe. The break point is at the cut out and the the force is impact in lbs. What is the wall thickness(or cross sectional area) at the cut out point? I know i may be missing variables...

Hi I am wondering would ye be able to help me out? I am instructed with the task of calculating the pressure drop and flow coefficient for a valve. Please see basic diagram attached for layout of valve. I need to find the pressure drop and flow coefficient when the ram is closed at different...

Hi, I have a question. Glove Valve PN16, JIS10k , ANSI 150#, AMSE, all they equal same, in withstand the steam pressure? I heard RN16 stand for 16bar pressure, but it's for steam too? I'm confuse.. million thanks if anyone would teach me please.

help please -- how does a valve work ?? how does a valve work ?? when in a uniform cross section pipeline a valve is closed it reduces d opening due to which the area decreses and as area decreases flow should increase A*v=constant so how does it work ? please explain mentioning the...

So I designed a circuit. It is controlling a pulsating actuator-solenoid. I used a power BJT as shown in attachment. Now I have a problem. As you can see all 4 circuits are in parallel. As a consequence, all 4 solenoids have one lead in common. When I test each subcircuit, it works...

In engine, there is valve and the valve spring. If you have ever look at the valve spring before, then you will notice that one end has its coil closer together than the other end. So a valve spring is a kind of progressive spring. In almost all engine repair manual I read, the instruction is...