Pneumatic membrane regulating valve failure forms and solutions

Pneumatic membrane regulating valve failure forms and solutions

Pneumatic membrane valve in operation, there will be a variety of process media flow through the automatic valve, including the process of raw materials, lumps, steam scouring of sediment, stones, iron filings, sheet metal, as well as instrumentation and technology installation Change the welding, gas cut into the pipe slag and so on. These foreign bodies and blocking substances, the automatic valve on the normal work and precision greater impact on the passage of time, will form a blockage, stuck. The scene generally take the following measures: 1, jam (1) cleaning method. This method is suitable for use in the process of parking inspection. Need to dismantle the regulating valve to remove dirt and foreign matter. It is noteworthy that, when dismantled, be sure to turn off the compressed air, so as to avoid unnecessary injury. Instrument seals and seals are also best replaced at the same time. (2) the use of scouring method. This method is more used in the field. When the control valve is clogged, it is usually the first to ask the chief technologist or OCC personnel if the valve can be repeatedly opened and closed, and the flow pressure of the existing process medium can be used to achieve the purpose of flushing. If the existing media and working conditions are not suitable, you can also use external steam or water under pressure to flush if the conditions are met. Flushing, pay attention to the opening of the valve control in place. (3) filter installed filter. In the process of installing filters on the pipeline is also a common measure of instrument automatic valve maintenance. In particular, the process is very important and smaller caliber control valve with this method, you can ensure that the automatic valve opening normal, stable conditions. 2, the internal leakage control valve seat into the smaller iron slag and hard objects, long-term stay can not be discharged, the valve pad, ring and valve will be subject to varying degrees of damage, affecting the ability of the leakage of the control valve. Especially for the autoclave of the high-pressure pipeline of the hydrogen production process of the reactor, a little damage or even scratches will cause internal leakage and affect safety in production. (1) grinding. Select the appropriate coarse sand and fine sand on the automatic valve pad and valve core grinding, improve the sealing surface of the valve pad and the valve smoothness and engagement. If the control valve is used in the high-pressure system, you need to pressure control valve after the test, and then normal use. (2) Enhancing the seal of the actuator. This method can ensure that the regulator valve closed tightly, sealed and reliable. Usually use the working range of moving springs, the selection of large power source of the implementing agencies and select a small stiffness of the spring to achieve. 3, leakage control valve packing is not replaced on schedule, the automatic valve locking device screws loose due to vibration, including just overhaul the control valve base screw is not tight or uneven force will cause the valve leakage. You can use the following methods: (1) replace the new filler to enhance the valve stem seal, you can also choose the seal grease to seal the stem. (2) can be properly used high-sealing metal wound gasket or PTFE packing, especially steam regulating valve, must use metal and graphite wound mats. (3) The lens pad to seal the upper and lower cover, if the valve seat and valve body seal is a flat seal, it is recommended to use a lens pad seal, the effect is significant. 4, control valve instability caused by instability control a lot of reasons, such as design selection is not reasonable, the valve diameter of the election is too small or too large; OCC process operators improper use of instruments and process parameters set unreasonable; configuration error Without debugging; process media pressure increases, flow instability, etc .; sometimes these are the result of several factors together. Often take the following specific methods: (1) select the appropriate valve diameter. If you take into account the economy and time, you can also consider the appropriate choice of variable diameter to increase or decrease the connection of the control valve and the process pipe diameter. (2) The PID value of a reasonable set, and after the actual commissioning of qualified operation, put into use. (3) to strengthen the stiffness of the control valve movement mechanism to ease the vibration of the control valve. (4) adjust the type of valve results to avoid the occurrence of resonance.

Tractor is developed on the basis of the Italian Wheeled Tractor chassis technology, adopting the British technology-based 6-cylinder turbocharged engine. The machine body has a streamline configuration. It is low in specific fuel consumption and better in power economic efficiency. It has multiple gears and a wide speed range. Besides, it is flexible in steering and easy to operate.


Wheeled tractor 120HP


Model

ME1200

Unit

 

Overall dimension

 

mm

4600*2150*2870

Min. Operating weight

 

kg

4205

Wheel base

 

mm

2510

Wheel track

Front

mm

1610

Rear

mm

1620

Min. Ground clearance

 

mm

430

Min, Turning radius

 

mm

5500

Gears

 

/

16F+8R

Engine

Max torque

N.m

430

 

Displacement

L

7.4

 

Fuel tank capacity

L

240

 

Engine rated power

KW

88.2

 

Fuel consumption rate

G/kw.h

≦242

Drive train

clutch

/

Single disc, dry, independent dual-stage

 

Standard PTO speed

rpm

(760/850)/(540/760)(760/1000)/(540/1000)

 

Gear shift mode

/

Meshing gear shift

Break system

type

/

Mechanical brake, hydraulic brake, disc

Walk system

Front tire

/

6.5-20

 

Rear tire

/

16.9-34

General parameter

Max. Lifting capacity

KN

21.2

 

Tillage depth adjustment

/

Draft and position adjustable



After-sales service

 

1.Warranty

Gold Dafeng grants our clients twelve-month-period warranty for any machine purchased from us which could reach the certain target quantity. During the warranty period, in case the defect of material or workmanship has occurred with spare parts in normal operation, the defective part will be repaired or replaced free of charge, at our discretion.

 

2.Spare parts

Gold Dafeng is dedicated to provide our clients with genuine spare parts with the highest quality, exact fitness and appropriate function. With our global distributor network, you are guaranteed with fast delivered and services, wherever you are, please submit your spare parts request to us, and list products name, model, equipment serial number, description of required parts. We guarantee that your request will be handled quickly and appropriately.

 

3.Installation&Maintenance

Gold Dafeng is able to provide you with the overall installation of complicated machinery and equipment, allowing you to start the normal operation of handling machinery immediately. After installation, we will make inspection of the whole machine, operate equipment, and provide you with testing data reports of installation and operation.

 

4.Training

 

Gold Dafeng  offer perfect facilities and comfortable environment and can provide training service to different users. The training sessions include product training, operation training, maintenance know-how, technical know-how training, standards, laws and regulations training and other training, all of which are tailored to fulfill your individual needs. Training programs can be conducted in our factory field, or at the client`s site.

 

5.technical advice

Gold Dafeng can also help clients coordinate with trained service personnel to provide you detailed and extensive knowledge about your specific machine. With our technical advice, your machine service life can be significantly prolonged and sustained with high capacity.

 



120hp Wheeled Tractor

120Hp Wheeled Tractor,120Hp Compact Wheeled Tractor,Four Wheel Drive Tractor,Wheeled Mini Farming Tractor

Shandong Gold Dafeng Machinery Co., Ltd , https://www.golddafengharvester.com