ZSSR-T series pneumatic O-type hard seat regulating ball valve

Ⅰ Summary
ZSSR-T series pneumatic O-type hard seat regulating ball valve consists of double action actuator, O-type ball valve, and valve’s positioner and so on. It is received the control signal (4-20mA) from DCS, QCS, PLC and regulating instrument, which compare to the feedback from positioner. The outputting air pressure signal from positioner would operate the piston inner the cylinder of actuator. Then, turn the valve trim of O-type valve until the signal being pro data. The changes from the valve trim will change the sectional area of valve’s flowing to up to the purpose for regulating. Because it is following the O-type trim, which has better sealing and cutting function. It is used for process controlling in the lots of industry areas, such as pulp paper, food, medicament, metallurgy, petroleum and chemistry, electric power ,sewage disposal industries and so on, especially for the medium of high viscosity and with fiber and small grain.

Ⅱ Main parameters and performance
◆Nominal pressure:
   1.6Mpa；2.5Mpa；4.0Mpa
◆Working temperature: -20℃-150℃-300℃
◆Leakage: Hard seat: GB/T17213-2005 class Ⅳ
    Soft seat: GB/T17213-2005 classⅤ
◆Flow characteristic: Equal percentage Graph
◆Air-supply pressure :0.4 Mpa ～ 0.6 Mpa
◆Intrinsic error: ≤ ±1.0% ～±2.0%
    Hysteresis plus dead band : ≤ 1.0% ～ 2.0%
   Dead band: ≤0.6% ～ 0.8%
(Note: The above date are determined by the positioner) 
◆ Input signal: 4～20mADC
◆Consumption of air: It mainly depends on the type of electric valve positioner selected. The air consumption of most positioner is 15L/min at home and abroad at present (air-supply pressure: 0.4Mpa), If select intellectual type, it will be less.

Ⅲ The compiling specification of series products’ model

 
Ⅳ Safety
ⅰ We make sure all the valves is very safe only if the material and pressure accord with the requirements in your order. 
ⅱ According to the 4th part in the national standard(GB/T17213-2005/IEC60534-1999) of control valves industry area, it is the examination and testing on duty. We have test and examined the pressure and material following the testing report so that we are sure the safety of valves. The technical demands as followed,
    
1. Material testing
The physical test and chemical composition of the material for producing control valves accord with the standard of control valve or the concerned requirements in the order.
    
2. The static pressure testing in the liquid
All the compositions of control valve, even no actuator, which must be finished the static testing in the liquid according to the concerned pressure. i.e. it is tested by 1.5 times to the rating pressure.

Ⅴ Principle of operation
The O-type regulating ball valve is made up of pneumatic actuator, valve body, and valve’s positioner, air filter, connecting and fastening pieces and so on. It finishes the position controlling from full open to full close by the valve’s positioner. Then, the signal (e.g., 0-10Ma, 4-20Ma,20-100K) from the controlling instrument or manual tool operating will control the valve’s positioner, which output the signal of air pressure at once to impulse the actuator so that it finishes the position controlling from open to closed by the wheel box to drive the O-type valve trim. The changes of valve’s position make the area of flowing changed so that it is up to the purpose for controlling flowing.

Ⅵ Installing, usage and maintenance
◆The position of installing the ball valve would be in the place as standing by the building platform 、a walking block ect. in order to having the best watching、adjusting、Operating、maintenance and repairing. 
◆The pneumatic O- type ball valve may horizontal fix or vertical installing. 
◆When to install the valve body, the medium must be flow to in a direction from the arrows on the valve body. The control voltage is either 24VDC or 220VAC. 
◆You would be added to lube oil in the wheel box of the actuator and the joints for half year at least. 
◆The waste materials should be removed before installation of piping systems. Once installed, the position of the valve body must be opened completely to sweep by blowing the wind into a pipeline. 
◆There are two screws(M12 ～ M20)  on the upper end of the cylinder of the pneumatic actuator and the lower end of the box, which is used for adjusting the position from fully open to fully close.

Ⅶ Storage
Control valve had better be kept in the room among 5℃-40℃ temp. and ≤90% in the humidity. You’d better make sure there are no corrosive characteristics and other bad components in the air.

Ⅷ Packing and transportation
The packing material must accord with the concerned packing standard and demands. The packing must be intact and whole. It should have the own symbol against rain or dust and how to lay up. You should prevent the strong shaking in order to protecting the packing well in the journey of transportation

Ⅸ、ZSSR-T pneumatic regulating ball valve (double acting)

1A  Positioner meter          4   Box                                 26  Axle                             35A Up adjust pressure
35B Regulate nut               35C Regulate frame         35D Regulate meter      35E Filter over coat 
45  Piston rod                     48  Poston rod gallow sheath     49  Seal  ring         50  Cylider soleplate nut                                        51  Tight fix screw               52  Spring washer           53  Box lid screw      
54  Box lid washer             55  Frame bolt                    56  Frame bolt washer   57.Body with flange                                  57A.Body cap                      58  Into air joint       59  Air pipe                                     67.Body and cap seal cushion