Automatic vacuum foaming machine, adopt batching technology, foaming in vacuum condition. It is Foam Making Machine,Epe Foam Sheet Machine,Vacuum Forming Machine,Polyurethane Foam Machine SOFTLIFE MATTRESS MACHINERY CO.,LTD , https://www.machinesoftlifefoam.com
composed of storage tanks, batching, mixing, vacuum, mould, and computerized controlling systems. It can be realized
numerical control during the whole production. It is used for making all kinds of foam.
Advantage: *The volume of the foam size can be 30% increasing at the same foaming formula.
* Reduce the chemical consumption and production cost.
* Suction and filtrate the foaming air. Environmental Protection.
* Monitoring the whole process of foaming by CCTV .
* Base plate can be Lifting automatically: it makes the sponge with uniform density and flat top by using
this way.
* Easy cleaning function.
* It can be realized numerical control with accurate and convenient ration during the whole production. And
it becomes more easily and stable to operate the machine
. * Continuous foaming.
* Flat top pressing device.(Additional)
How to choose the valve
The selection of suitable valve according to the following procedures, one by one inspection, so be selected with the valve to meet their functions, the implementation of the tasks delivered. (1) the characteristics of the valve and the main executive function Understand the characteristics of various types of valves and their executive function, the first step for the selection of suitable valves, the characteristics of various types of valves, classification and the main executive function in front of 2, 3 As mentioned in the section, it is summarized as Table I and Table II for reference. (2) caliber or flow (volume) "Table III shows" The nominal diameter of the valve, which is not necessarily the same as the diameter of the flow path, is chosen so that the required Cv value is calculated from the condition of the delivered fluid and then the caliber of the suitable valve is selected from the Cv value (see manufacturer's catalog). B. The Cv value is defined as the Cv value measured per minute at a pressure drop of 1 at 60 degrees Fahrenheit after the water has passed through the valve. C. Cv value can be calculated through the valve flow (Q). Q = CvΔP = 7.9Cv P = liquid density, LB / FT3 ΔP = pressure drop after passage through the valve, PSI (3) Temperature VS The "temperature VS pressure" of the pressure valve is the value specified by the valve at a given temperature Permissible and safe pressure (but this pressure is the maximum permissible pressure without impact). 5. Valve structure material Valve structure of the material selection, the functional life of the valve can be extremely important, but the general structure of the valve material is divided into two main categories: Pressure main material: body, bonnet, bottom cover, bolts and so on. Pressure main material selection Main factors considered: a. Fluid temperature, pressure: A) high temperature use: metal materials generally in high temperature environment, its tensile strength and life expectancy decreases with increasing temperature, the latent change The strength also has an impact. B) low temperature use: metal materials at low temperatures in the use of occasions, the sharp decline in its toughness to produce low temperature brittleness phenomenon. b. Corrosion resistance of the material: Causes of valve structure metal corrosion: (A) Fluid type (B) Concentration (C) Temperature Corrosion Damage form: (A) And stripping (D) Intergranular corrosion (E) cracking c. Erosion resistance of materials: Generally, erosion resistant materials must have the following features: A) strong oxide coating material B) Material with high fatigue limit D) Material with higher hardness B. TRIIM: Main parts such as valve seat, valve seat, stem, guide bush and internal small parts Material selection Considerations: a) fluid temperature b) material corrosion resistance c) material erosion resistance d) material wear resistance and anti-viscosity (6) bonnet form General bonnet and valve body combination, there are the following, according to Valve size, usage conditions, temperature and pressure and leakage caused by the risk of other conditions, for its evaluation options. A. SCREWED BONNET B. Bolt bonded (BOLTED BONNET) C. Weld combined (SEAL WELDED BONNET) D. Pressure-sealed (PRESSURE SEAL BONNET) E. The special requirements of the valve structure by the UNION TYPE (7) are different depending on the temperature and the place of application. Special requirements are listed as follows: A. Fireproof and anti-static design - special attention must be paid to the design and usage of the ball valve. B. Extended bonnet design - used in freezing valve, conveying liquefied gas. C. Noise and Cavitation Restrictions - Especially for control valve design and use of special considerations. D. Anti-filler leakage of the retractable capsule reference design - to be absolutely closed, no place to consider. 4.8 mode of operation is generally limited to the installation environment, operation, operating conditions or the number of times, with electric and pneumatic drive considerations, and due to the popularity of computer applications, and development to the entire system process connection and monitoring, without human-driven . However, most of them are still willing to adopt the economy and durability of the wheel or gear reducer.