Speed Needle Valve
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 NEW OS Needle Valve Assembly 12FB 12XZ Speed 21681900 NIB  US $21.99
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 OS Engines Needle Valve Assembly 12FB 12XZ Speed OSM21681900 US $21.99
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 Saito Engines Hi Speed Needle Valve VV US $12.34
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 NEW Tower Hobbies High Speed Needle Valve Assy 25 BB ABC TOWG0623 NIB US $11.99
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 TE9007 BASE SPEED NEEDLE VALVE FOR SH28 ENGINE US $11.24
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 Saito Engines Hi Speed Needle Valve VV SAI200TI85 US $11.49
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 TE9011 HIGH SPEED NEEDLE VALVE FOR SH28 ENGINE US $9.72
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 SPORTWERKS LOW SPEED NEEDLE VALVESWK2126 SWK8023 NIB US $10.00
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 TRAXXAS 4050 HIGH SPEED NEEDLE VALVE US $10.00
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 Evolution Engines 100829A High Speed Needle Valve 346829a US $9.99
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 Sportwerks Low Speed Needle Valve SWK 2126 26v2 US $9.99
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 Traxxas 4050 High Speed Needle Valve Seat Assembly US $9.84
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 Traxxas High Speed Needle Valve Seat US $9.06
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 NEW Axial High Speed Needle Valve Set 28 32 AX030 NIB US $8.79
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 Traxxas 4050 High Speed Needle Valve Seat Assembly 1215 New US $8.45
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 Dynamite High Speed Needle Valve DYN 21 US $7.99
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 DYNAMITE 12 HIGH SPEED NEEDLE VALVE DYN6322 NIB US $7.49
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 DYNAMITE LOW SPEED NEEDLE VALVE DYN6559 NIB US $7.14
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 Dynamite High Speed Needle Valve with O Ring 21XPV2 DYNP5575 US $6.19
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 Dynamite 6470 Low Speed Needle Valve 32M US $5.99
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 Saito Engines High Speed Needle Valve120 220A US $5.99
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 NEW Axial High Speed Needle Holder Valve 28 32 AX027 NIB US $5.99
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 Axial High Speed Needle Valve Holder 28 32 AXIAX027 US $5.99
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 HPI Low Speed Needle Valve w O Ring D Cut K59 HPI15263 US $5.89
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 NEW Axial Low Speed Needle Valve 28 32 AX039 NIB US $5.39
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 Axial Low Speed Needle Valve 28 32 AXIAX039 US $5.39
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 HPI Racing Nitro Star K59 Low Speed Needle Valve w O Ring HPI15263 US $5.25
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 HPI 15263 Low Speed Needle Valve with O Ring US $5.24
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 AXIAL AX027 HIGH SPEED NEEDLE VALVE HOLDER2832 ENGINE New US $5.09
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 HPI High Speed Needle Valve w O Ring 46K59 HPI15275 US $4.99
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 Evolution Engines Low Speed Needle Valve 52H US $4.99
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 Dynamite Low Speed Needle Valve15S US $4.95
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 HPI 15263 Low Speed Needle Valve w O Ring D Cut K59 US $4.80
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 TE9003 O RING FOR BASE SPEED NEEDLE VALVE SH28 ENGINE US $4.67
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 Axial AX027 High Speed Needle Valve Holder 28 32 Engines New US $4.52
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 DYNAMITE LOW SPEED NEEDLE VALVE 15S DYN6559 US $4.49
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 DYNAMITE Low Speed Needle Valve15S DYN6559 US $4.30
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 Evolution Trainer Power System EVO100829A High Speed Needle Valve 346829a US $4.19
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 Dynamite Low Speed Needle Valve15S DYN6559 US $4.09
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 Supertigre Low Speed Needle Valve 18 Marine SUPG4900 US $3.99
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 Evolution Engines High Speed Needle Valve 346829a EVO100829A US $3.99
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 Evolution Engines High Speed Needle Valve 346829a US $3.99
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 NEW SuperTigre Low Speed Needle Valve 18 SUPG4900 NIB US $3.99
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 Saito Engines High Speed Needle ValveLL SAI90TS85 US $3.99
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 Evolution High Speed Needle Valve 346829a EVO100829A US $3.99
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 Saito Engines High Speed Needle ValveLL US $3.95
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 DYNAMITE HIGH SPEED NEEDLE VALVE 15S DYN6555 US $3.95
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 Saito Engines Needle ValveHigh SpeedAC SAI40MK385 US $3.79
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 Saito Engines Needle ValveHigh SpeedAC US $3.75
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 FOX HIGH SPEED NEEDLE VALVE 6 40 27064 US $3.50
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 Saito Engines Hi Speed Needle ValveQAA US $3.50
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 Evolution High Speed Needle Valve 40NX EVO040829F US $3.49
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 Evolution Engines High Speed Needle Valve 40NX60NX US $3.49
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 Saito Engines Hi Speed Needle ValveQAA SAI100T85 US $3.49
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 Evolution Engines High Speed Needle Valve Set with Gasket US $3.40
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 Evolution High Speed Needle Valve Set with Gasket EVO120829A US $3.39
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 TE9012 O RING FOR HIGH SPEED NEEDLE VALVE SH28 ENGINE US $2.91
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 Dynamite High Speed Needle Valve 12 DYN6322 US $2.80
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 Supertigre High Speed Needle Valve O Ring 18 Marine SUPG5021 US $1.00
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Control Valve - The Versatile Control Element
Control valves are the valves used to control pressure, volume, liquid level and flow direction in a fluid transmission system. The device is capable of moulding flow at different degrees ranging from a minimum flow to the full capacity in response to a signal from an external control device. Being the most critical part of any control loop, the control valve is also known as "the final control element".
Usually, the most important part in hydraulic machinery is directional control valves. It has the ability to restrict and permit the actual flow. There are two types of directional control valves- hydraulic and pneumatic. While hydraulic directional control valve focuses on liquid working flow, pneumatic directional control valve is meant to control gaseous working fluid. Most of the industries purchase the control valves on the basis of few static specifications like pressure ratings, flow capacity and fluid type. There are certain dynamic characteristics of a control valve which need to be kept in mind before making the final purchase decision. A right kind of choice will always be helpful to mitigate process-control-related problems. Some of the characteristics include: process-side error, stroking speed, positioning resolution, overshoot, installed gain, friction, dead band, and hysteresis and load sensitivity.
Control valves have few common features such as self-lubricating, chemical resistance and wear resistance. The quality of a good control valve can be judged through its temperature and pressure level that ranges from 60 degree F to + 400 degree F.
The ability of control valves depend on lot of factors. If the quality of control valves is good then it is highly useful to reduce process variability. It is very important that valve assembly should be optimized or fully developed as a unit. When the components of valve are designed as a complete assembly it yields the best dynamic performance. There are three important areas of design considerations such as valve response time, dead band and actuator/positioned design.
The efficiency of control valve can directly affect the profits of process plant. Control valve is the most crucial part that can create change in the process variable. It is very important to see that control valve is working in an accurate manner. The device can lead to excellent results if it is operated in a proper way. An organisation cannot achieve high level of success without focussing on good valve management. It may adversely affect the industry's quality production, profits and energy.
There are several ways to optimise the valve efficiency. The factors that can determine the optimum use of control valve depends on proper storage and protection of valve. It also depends on correct control valve selection for the application. There should be proper installation techniques and an effective predictive maintenance programme.
The basic types of control valves are ball valve, ceramic disc valve, butterfly valve, duplex ball valve, check valve, diaphragm valve, gate valve, choke valve, 3 hastelloy check valves, needle valve, globe valve, knife valve, piston valve, pinch valve, sampling valves, pressure relief valves, thermal expansion valve, spool valve, poppet valve and plug valve.
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For More Info:- Control Valve | Directional Control Valve
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