1. Product name:
2. Product introduction:
AKD High Polymer Emulsifier (instead of traditional cationic starch based) is a kind of cationic polymer product developed by our technical department,which is the initiative developed product in the market.It can not only emulsify AKD Wax ,but also proteched the AKD colloid dispersion and aid retention,it also can increase AKD sizing efficiency(2%-8%).It can get the high stability and better fixing effect AKD emulsion by mechanical stirring,in the meantime it greatly decrease AKD hygrolysis during storage and sizing process.Final AKD Emulsion shelf time is about 6 months which is longer than starch emulsified AKD emulsion.The final AKD Emulsion also has quicker curing effect.
3.Specification and Index:
Item
Specification
Appearance
light yellow viscosity liquid
Solid content
40%min
Viscosity,mPa.s,25°C
2000-10000 mPa.s
pH value
2-5
shelf life
6 months
This Emulsifier greatly restricts the AKD hydrolysis and the migration aptitude.It can replace the Starch Based Emulsifier and AKD Curing Agent,at the same time decrease the AKD WAX using quantity.The final AKD Emulsion by this high polymer emulsifier can realize 80% sizing effect after paper machine,and almost totally realize after rewinding,which can let the paper immediately get the good water resistance effect,so less surface sizing agent in size press can fulfill all the sizing requirement.For detail using method,please contact Greatland Chemicals Co.,Ltd.
5. Package and storage:
It should be stored in the warehouse with dry and cool condition protected from frozen and sunlight directly. The temperature should be below 30°C.
Packing with 200kg, 1000kg/drum.
High Polymer Emulsifier High Polymer Emulsifier,40% High Polymer Emulsifier,AKD High Polymer Emulsifier,AKD Emulsifying Agent Shandong Tiancheng Chemical Co., Ltd. , https://www.tianchengchemical.com
(1) Leakage. Under the normal operating pressure of the device, leakage beyond the allowable level occurs between the disc and the seat sealing surface. The reasons are: There is dirt between the valve flap and the sealing surface of the valve seat. Use a lifting wrench to open the valve a few times to flush away the dirt; the sealing surface is damaged. Should be based on the degree of damage, grinding or grinding after grinding method to repair; valve stem bending, tilting or deflection of the lever and fulcrum, so that the spool and valve disc misalignment. Should be reassembled or replaced; spring elasticity reduced or lost elasticity. Replace the spring and readjust the opening pressure.
(2) Does not turn on until the specified pressure. The reason for this situation is that constant pressure is not allowed. The amount of spring compression or the position of the weight should be readjusted; the valve flap sticks to the valve seat. The safety valve shall be manually deflated or drained periodically; the lever of the lever-type safety valve is jammed or the hammer is moved. The weight position should be readjusted and the lever should move freely.
(3) The pressure is less than the prescribed pressure. The main reason is that the constant pressure is not accurate; spring aging elasticity decreases. Tighten the adjusting screw or replace the spring properly.
(4) The pressure continues to rise after exhausting. This is mainly due to the safety discharge volume of the selected safety valve displacement level equipment. The appropriate safety valve should be selected again; the stem centerline is not correct or the spring is rusted, so that the valve disc cannot be opened to the proper height, and the valve stem should be reassembled. Or replace the spring; exhaust pipe cut enough, should be taken to meet the safety discharge area of ​​the exhaust pipe.
(5) The valve flap does not return to seat after discharge. This is mainly caused by the spring bending valve stem, the valve disc mounting position being incorrect or being stuck. Should be re-assembled.
(6) Valve flap or vibration. This is mainly due to the high spring stiffness. Should use a spring with appropriate stiffness; improper adjustment of the adjustment ring will make the pressure in the seat back too high. The position of the adjusting ring should be readjusted; the discharge pipe resistance is too large, resulting in excessive discharge back pressure. The discharge pipe resistance should be reduced.
4. Application:
The main cause of failure of a safety valve is due to improper design, manufacture, selection, or use. If these failures are not eliminated in time, the effectiveness and life of the valve will be affected, and even safety protection will not be available. Common faults and how to deal with it are as follows: