1. Convolution width

Convolution width refers to the gap between cylinder wall and piston skirt. By reducing the convolution width, the working pressure can be increased. In general, the convolution width should be at least four times the thickness of the diaphragm side wall.a

2. Cylinder diameter (inner diameter)

The cylinder diameter (inner diameter) refers to the inner diameter of the cylinder suitable for diaphragm installation, which also includes the outer diameter of convolution.

3. Cylinder radius

Cylinder radius refers to the transition radius between cylinder wall and flange.

4. Piston cap

The piston cap refers to a metal plate attached to the piston, which is clamped in the piston space of diaphragm to ensure that the diaphragm stays in convolution.

5. Piston diameter

Piston diameter refers to the piston head, including radius.

6. Piston radius

The piston radius refers to the transition radius from the top of the piston to the piston skirt.

7. Piston skirt

Piston skirt refers to the side wall part of piston, which determines the inner diameter of convolution