According to the international standards of several commonly used, the size of the valve diameter and wall thickness.These standards and sizes shown in the following table.Install a plumbing system, in order to correctly choose consistent international pipeline interface standard is very important, so as to ensure the process piping system conform to the requirements of the health level.
If the valve interface standard and system pipeline and system interface standards are in consistent, is easy to cause deformation within the interface or the steps, there is no guarantee that the emptying function of the valve.
Butt welding is the most common way of connection interface, without any other materials. Usually includes automatic welding and argon arc welding welding way,besides this way, we can also provide other way of connection.
Manual diaphragm valve Pneumatic diaphragm valve
Butt welding standard | ISO 1127 | DIN 11850 | DIN series selection | ASTM 269 ASME BPE | SMS 3008 | JIS G3447 | ||||||||
Series 1 | Series 2 | |||||||||||||
DN | NPS | MA | L(min) | L1 | h1 | h2 | φd×s | φd×s | φd×s | φd×s | φd | s | φd×s | φd×s |
10 | 3/8 | 10 | 25 | 72 | 9 | 9 | 17.2×1.6 | 12×1.0 | 13×1.5 | — | — | — | — | — |
15 | 1/2 | 20 | 25 | 120 | 13 | 16 | 21.3×1.6 | 18×1.0 | 19×1.5 | — | 12.7 | 1.65 | — | — |
20 | 3/4 | 20 | 25 | 120 | 16 | 16 | 26.9×1.6 | 22×1.0 | 22×1.5 | — | 19.05 | 1.65 | — | — |
25 | 1 | 25 | 25 | 120 | 19 | 19 | 33.7×2.0 | 28×1.0 | 29×1.5 | — | 25.4 | 1.65 | 25.0×1.2 | 25.4×1.2 |
32 | 1 1/4 | 40 | 25 | 153 | 24 | 26 | 42.4×2.0 | 34×1.0 | 35×1.5 | — | 31.75 | 1.65 | 33.7×1.2 | 31.8×1.2 |
40 | 1 1/2 | 40 | 25 | 153 | 24 | 26 | 48.3×2.0 | 40×1.0 | 41×1.5 | — | 38.1 | 1.65 | 38.0×1.2 | 38.1×1.2 |
50 | 2 | 50 | 32 | 173 | 32 | 32 | 60.3×2.0 | 52×1.0 | 53×1.5 | — | 50.8 | 1.65 | 51.0×1.2 | 50.8×1.5 |
65 | 2 1/2 | 50 | 32 | 173 | 32 | 32 | — | — | — | — | 63.5 | 1.65 | 63.5×1.6 | 63.5×2.0 |
65 | 2 1/2 | 80 | 47 | 216 | 47 | 47 | 76.1×2.0 | — | 70×2.0 | — | 63.5 | 1.65 | 63.5×1.6 | 63.5×2.0 |
80 | 3 | 80 | 47 | 254 | 47 | 47 | 88.9×2.3 | — | 85×2.0 | — | 76.2 | 1.65 | 76.1×1.6 | 76.3×2.0 |
According to the requirements, can also provide other standard docking
The above table shown in bold in the size of the preferred specification