Butterfly valve

A butterfly valve, comprising:

• a body having a first opening, a second opening, a third opening, and a passage extending between the first opening and the second opening, the passage having a first axis, the third opening having a second axis transverse to the passage;
• a disk within the passage, the disk having an open position wherein the disk is non-perpendicular to the first axis of the body and a closed position wherein the disk is perpendicular to the first axis of the body;
• a platform supported on the body, the platform having a first opening aligned with the third opening of the body;
• a gear assembly supported on the platform, the gear assembly including:
• a valve stem supported on the platform by a support, the valve stem having a threaded portion;
• and
• a pin nut having a threaded portion engaging the threaded portion of the valve stem;
• a shaft coupled to the disk, the shaft passing through the third opening of the body and the first opening of the platform;
• a Scotch yoke actuator on the shaft, the Scotch yoke actuator being cast with the shaft, the Scotch yoke actuator having a slot, the pin nut including a pin extending into the slot;
• and
• a gear box cover having a plurality of sides defining an internal cavity, the internal cavity sized to house the gear assembly, the gear box cover configured to be removably mounted to and covering the platform.

A butterfly valve, comprising:

• a body having a first portion, a second portion, and a passage with an axis, a first bearing case extending from the first portion of the body, the first bearing case having an opening therethrough;
• a second bearing case on the second portion of the body, the second bearing case aligned with the opening of the first bearing case;
• a platform supported over the first portion of the body, the platform having an opening, the opening of the platform aligned with the opening of the first bearing case;
• a valve stem supported on the platform by a support, the valve stem having a threaded portion;
• a pin nut having a pin and a threaded portion engaging the threaded portion of the valve stem;
• a disk within the passage of the body, the disk having an open position wherein the disk is non-perpendicular to the axis of the passage and a closed position wherein the disk is perpendicular to the axis of the passage;
• a first shaft including:
• a first end coupled to the disk;
• a second end opposite the first end;
• and
• a length between the first end of the first shaft and the second end of the first shaft, the length passing through the opening of the first bearing case and the opening of the platform;
• a Scotch yoke actuator on the length between the platform and the second end of the first shaft, the Scotch yoke having a slot fitting the pin on the pin nut;
• a second shaft including:
• a first end coupled to the disk;
• a second end in the second bearing case;
• and
• a length between the first end of the second shaft and the second end of the second shaft;
• and
• a gear box cover removably mounted to and covering the platform, the gear box cover having one or more walls defining an internal cavity, the gear box cover having a first opening through the one or more walls to pass the first shaft, the gear box cover having a second opening through the one or more walls to pass the valve stem;
• and
• a limit switch in the internal cavity, the limit switch configured to be activated by contact with the Scotch yoke actuator.

A butterfly valve comprising:

• a body having a fluid conduit and a gear platform, the gear platform supported on and over the fluid conduit, the gear platform configured to support a gear assembly for actuating a valve disk between an open position and a closed position;
• a shaft configured to be coupled to the valve disk, the shaft passing through an opening of the gear platform;
• a Scotch yoke actuator on the shaft, the Scotch yoke actuator being cast with the shaft, the Scotch yoke actuator having a slot, the slot configured to engage the gear assembly;
• a gear box cover having a plurality of sides defining an internal cavity, the internal cavity sized to house the gear assembly, the gear box cover configured to be removably mounted to and covering the platform;
• and
• a gear box cover defining an internal cavity, the internal cavity sized to house the gear assembly, the gear box cover configured to be removably mounted to the gear platform.