Pneumatic control valve of the five installation problem puzzle for you

Pneumatic control valve of the five installation problem solve confusion for your new design, installation of control system, in order to ensure that the pneumatic - valve when driving to work, and make the system safe operation, a new valve before installation, should mark on the first check valve nameplate is consistent with the design requirements. At the same time also respond to the following project debug. The basic error limits; All the schedule deviation; Back to the poor; Dead zone; Leakage ( In demanding situations) 。 If it is on the original system of pneumatic control valve repair, except to check all the information, also respond to the stuffing box and the connection of the old valve sealing check etc. Pneumatic control valve in use at the scene, many are often not because quality caused by the pneumatic - valve itself, but rather that caused by improper use of pneumatic control valve installation, such as installation environment, installation position and direction due to reasons such as caused by improper or line is not clean. So the electric pneumatic regulator should pay attention to the following aspects (when install and use 1) Pneumatic - valve belongs to the field instruments for environmental temperature should be in 25 ~ 60 ℃, relative humidity 95% or less. If it is installed in the open air or high temperature applications, waterproof, cooling measures should be taken. Where there is the source to stay away from source or increase the antivibration measures. ( 2) Pneumatic control valve should be installed vertically, commonly special circumstances can tilt, such as the Angle is very big, or too much weight on the valve when the valve itself should increase support protection. ( 3) Installation of pneumatic control valve pipe generally do not too high above the ground or floor, height is greater than 2 m in pipe should try to set up the platform, facilitate the handwheel operation and easy maintenance. ( 4) Pneumatic control valve before installation for pipeline cleaning, eliminate dirt and welding slag. After installation, to ensure that no residue in the body, should also again to the valve and clean, the access into the medium should make all open valve, in order to avoid impurity stuck. After using the handwheel institutions, should be restored to the original neutral position. ( 5) In order to make the pneumatic control valve in the event of a fault or repair can continue to make the production process, under the condition of pneumatic control valve should add by-pass line. At the same time also should pay special attention to, the installation of the pneumatic control valve position whether accord with the requirement of technological process. Applicability low pneumatic - valve pneumatic control valve to allow the liquid viscosity, generally under 20 CST, more than 20 CST shall be indicated. Low working pressure difference, line the high-pressure difference in less than 0. 04 mpa should be chosen when straight acting principle of electromagnetic valve; The minimum working pressure difference is greater than zero. 04 mpa when guiding type (optional Differential pressure type) Electromagnetic valve; Maximum working pressure difference should be less than the biggest calibration pressure solenoid valve; General pneumatic control valve is a one-way work, so should pay attention to whether there is back pressure pneumatic - valve outlet is poor, if you have to install the check valve. Low fluid cleanliness is not high when the filters should be installed in front of the pneumatic control valve, pneumatic control valve request fluid medium to large volume of solid impurities.