Diaphragm for pneumatic controller
A pneumatic controller includes a housing, a piston located in the housing and movable therein and a diaphragm located at the piston to isolate a first chamber of the pneumatic controller from a second chamber of the pneumatic controller. The diaphragm includes a first diaphragm surface, a diaphragm opening extending through the diaphragm, and a fabric reinforcing layer to strengthen the diaphragm. A diaphragm to isolate a first chamber of a pneumatic controller from a second chamber of a pneumatic controller includes a first diaphragm surface, a diaphragm opening extending through the diaphragm, and a fabric reinforcing layer to strengthen the diaphragm.
1. A pneumatic controller, comprising:
a housing;
a piston disposed in the housing and movable therein;
a diaphragm disposed at the piston to isolate a first chamber of the pneumatic controller from a second chamber of the pneumatic controller, the diaphragm including:
a first diaphragm surface;
a diaphragm opening extending through the diaphragm;
two fabric reinforcing layers to strengthen the diaphragm; and
a second diaphragm surface opposite the first diaphragm surface, the two fabric reinforcing layers disposed between the first diaphragm surface and the second diaphragm surface;
wherein the two fabric reinforcing layers are of unequal size.
2. The pneumatic controller of claim 1 , further comprising:
a spring seat disposed at the piston; and
a spring operably connected to the spring seat to bias a position of the piston;
wherein the diaphragm is disposed between the piston and the spring seat.
3. The pneumatic controller of claim 1 , wherein at least one fabric reinforcing layer of the two fabric reinforcing layers are disposed at the first diaphragm surface.
4. The pneumatic controller of claim 3 , wherein the at least one fabric reinforcing layer covers an entirety of the first diaphragm surface.
5. The pneumatic controller of claim 3 , further comprising at least another fabric reinforcing layer of the two fabric reinforcing layers disposed at the second diaphragm surface.
6. The pneumatic controller of claim 1 , wherein at least one fabric reinforcing layer of the two fabric reinforcing layers are integrally molded into the diaphragm.
7. The pneumatic controller of claim 1 , wherein the two fabric reinforcing layers are formed from a high temperature resistant material.
8. A diaphragm to isolate a first chamber of a pneumatic controller from a second chamber of a pneumatic controller comprising:
a first diaphragm surface;
a diaphragm opening extending through the diaphragm; and
two fabric reinforcing layers to strengthen the diaphragm; and
a second diaphragm surface opposite the first diaphragm surface, the two fabric reinforcing layers disposed between the first diaphragm surface and the second diaphragm surface;
wherein the two fabric reinforcing layers are of unequal size;
wherein at least one fabric reinforcing layer of the two fabric reinforcing layers is disposed at the first diaphragm surface; and
wherein the at least one fabric reinforcing layer covers less than 75% of the first diaphragm surface.
9. The diaphragm of claim 8 , wherein the at least one fabric reinforcing layer covers between 25% and 75% of the first diaphragm surface.
10. The diaphragm of claim 8 , further comprising at least another fabric reinforcing layer of the two fabric reinforcing layers disposed at the second diaphragm surface.
11. The diaphragm of claim 8 , wherein the at least one fabric reinforcing layer of the two fabric reinforcing layers is formed from a high temperature resistant material.
12. The diaphragm of claim 8 , wherein the at least one fabric reinforcing layer of the two fabric reinforcing layers is integrally molded into the diaphragm.
13. A pneumatic controller, comprising:
a housing;
a piston disposed in the housing and movable therein;
a spring seat disposed at the piston;
a spring operably connected to the spring seat to bias a position of the piston;
a bolt extending through the spring seat into the piston to secure the spring seat to the piston;
a diaphragm interposed between the piston and the spring seat to isolate a first chamber of the pneumatic controller from a second chamber of the pneumatic controller, the diaphragm including:
a first diaphragm surface;
a diaphragm opening extending through the diaphragm, the bolt extending through the diaphragm opening; and
two fabric reinforcing layers to strengthen the diaphragm; and
a second diaphragm surface opposite the first diaphragm surface, the two fabric reinforcing layers disposed between the first diaphragm surface and the second diaphragm surface;
wherein the two fabric reinforcing layers are of unequal size; and
a collar disposed at the spring seat and extending through the diaphragm opening.