| 摘要 |
A diaphragm valve comprises at least one valve body which has at least one inlet, at least one outlet, at least one flow channel and at least one shutoff web dividing the flow channel into channel portions. The diaphragm valve furthermore comprises a diaphragm which rests on a circumferential sealing seat of the valve body, and a drive having a drive housing, the drive being coupled to the diaphragm to press the diaphragm against the shutoff web for closing the valve. The diaphragm valve furthermore comprises a fastening unit for detachably locking the drive to the valve body, the fasting unit having a bayonet cap and an additional central retightening unit by means of which an axial tightening force is generated. |
| 主权项 |
1. A diaphragm valve, comprising at least one valve body which has at least one inlet, at least one outlet, at least one flow channel and at least one shutoff web dividing the flow channel into channel portions, a diaphragm resting on a circumferential sealing seat of the valve body, a drive having a drive housing, the drive being coupled to the diaphragm to press the diaphragm against the shutoff web for closing the valve, and a fastening unit for detachably locking the drive to the valve body, wherein the fastening unit has a bayonet cap comprising a clamping ring and an additional central retightening unit in the form of a union nut screwed on the clamping ring, wherein the drive housing is formed in several parts and has an attachment housing part, wherein the retightening unit surrounds the attachment housing part in circumferential direction, the attachment housing part supporting the retightening unit such that the retightening unit is able to push the attachment housing part axially towards the diaphragm, an axial tightening force being generated by the retightening unit, wherein the fastening unit and the drive housing are configured such that the diaphragm is laterally visible at the circumference. |
