Pressure Reducing Valve
Type 2405
Contents 1Design and principle of operation. . . . . . . . . . . . . . . . . . . . . .41.1Process medium and field of application . . . . . . . . . . . . . . . . . . .42Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42.1Mounting positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42.2Strainer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62.3Shut-off valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62.4Pressure gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62.5Control line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63.1Start-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63.2Set point adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . .83.3Decommissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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4Maintenance and troubleshooting. . . . . . . . . . . . . . . . . . . . . .94.1Pressure fluctuations. . . . . . . . . . . . . . . . . . . . . . . . . . . . .95Nameplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106Customer rvice . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .118
Dimensions and weights. . . . . . . . . . . . . . . . . . . . . . . . . .12
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EB 2520EN
Contents
WARNING!WARNING indicates a hazardous situation which,if not avoided,could result in death or rious injury.
NOTICE
NOTICE indicates a property damage
message.
Note:Supplementary explanations,informa-tion and tips Definitions of the signal words ud in the instructions
Safety instructions
观沧海ppt
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1
Design and principle of operation
See Fig. 1 on page 5.
The medium flows through the valve in the di-rection indicated by the arrow.The position of the valve plug (3)determines the area relead between the plug (3) and at (2).In the idle position (control line not connected or no pressure applied),the valve is opened by the force of the t point springs (7).The downstream pressure p 2to be controlled is tapped downstream of the regulator using an external control line.This pressure is trans-ferred to the actuator housing (6)over the control line and is converted into a position-ing force by the diaphragm plate with operat-ing diaphragm (5).This force is ud to move the plug stem (4)and the valve plug as a re-sult,depending on the force of the t point springs (7).The spring force can be adjusted at the t point adjuster (8).
If the force resulting from the downstream pressure p 2exceeds the spring force adjusted at the t point springs,the valve clos in proportion to the pressure change.
In the version with pressure balancing,the forces at the plug caud by the upstream and downstream pressures are eliminated by the balancing diaphragm (10).The plug is fully balanced.
1.1
Process medium and field of application
The Type 2405Pressure Reducing Valves are only suitable for controlling gas in the tem-perature range between –20and +60 °C .
2Installation
See Fig. 1 on page 5.
NOTICE
A strainer (SAMSON Type 2NI)must be in-stalled upstream of the regulator (e c-tion 2.2).
The regulator must be installed free of stress.If necessary,support the piping near the con-nections.However,do not attach supports to the valve or actuator.
2.1Mounting positions
Standard installation – preferable ––Install the valve in a horizon-tal pipeline .The actuator with t point adjuster must face upwards .
喜出望外的造句
–Make sure the medium flows咳血是什么原因引起的
through the valve in the direction indicated by the arrow.
–Install the control line to the tapping point with an approx.10 %slope to allow any condensing liquid to flow back into the ves-l (tank) or pipe.Other possible installations –Install the valve in a vertical pipeline.The actuator with t point adjuster must point to the side .
Note:System deviations may occur in this mounting position.
–The medium must flow from the top of the valve downwards.
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EB 2520EN
辣椒的功效
黯然销魂什么意思Design and principle of
operation
Installation
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2.2Strainer
The strainer must be installed upstream of the regulator(Fig.2).Make sure the direction of medium flow corresponds with the direction indicated by the arrow on the strainer.The fil-ter element must be suspended to hang down-wards.Remember to leave enough space to remove it.
2.3Shut-off valve
Install a hand-operated shut-off valve both upstream of the strainer and downstream of the regulator(e Fig.2).This allows the plant to be shut down for cleaning and mainte-nance and when the plant is not ud for lon-ger periods of time.
2.4Pressure gauge
To monitor the pressures in the plant,install a pressure gauge both upstream and down-stream of the regulator (e Fig. 2).
2.5Control line
Connection G¼is located at the actuator housing.A control line with an inside diame-ter of min.6mm(preferably8x1mm,steel or stainless steel pipe)must be provided at the site of installation.
The control line connection for pressure tap-ping must always be directly attached to the vesl(tank)becau the medium is in the ex-panded state and no turbulence occurs at this point.
If the pressure is to be tapped at a straight pipeline ction,the largest possible distance to the regulator must be kept(at least6x DN).Connect the control line at the side or top of the horizontally running main pipeline.If pos-sible,place the point of pressure tapping in a pipe expansion.
Install any pipe strictions, bends,manifolds or branches),that may cau turbulence in the flow,sufficiently far away from the pressure tapping points(at least 6 x DN).
Note:If the gas to be controlled is damp,con-densate may collect in the control line which could damage the controller.Install the con-trol line with an approx.10%slope to the pressure tapping point in the vesl(tank)or pipe to allow the condensate to flow back into the vesl.
3Operation
英文手抄报简单好看
3.1Start-up
本机地址NOTICE
First start up the regulator after mounting all the components.
The control line must be free of dirt and the flow cross-ction must be open.
Make sure the control line is correctly con-nected.
Open the shut-off valves slowly preferably starting from the return flow pipe side.Avoid pressure surges (hammering).
身老沧州
6EB2520EN Installation
