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A crank for a valve linkage system includes a pin sleeve having a bore for receiving a connecting pin to connect the crank to a link; a shaft sleeve having a bore for receiving a shaft; an arm between the pin bore and shaft sleeve; and a first stiffening rib extending from the shaft sleeve toward th

A crank for a valve linkage system includes a pin sleeve having a bore for receiving a connecting pin to connect the crank to a link; a shaft sleeve having a bore for receiving a shaft; an arm between the pin bore and shaft sleeve; and a first stiffening rib extending from the shaft sleeve toward the pin bore.

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1. A valve linkage system comprising: a pin sleeve having a pin bore for receiving a connecting pin to connect a crank to a link in the valve linkage system, wherein a connection between the crank and the link consists of one side of the crank interfacing with one side of the link such that there is

1. A valve linkage system comprising: a pin sleeve having a pin bore for receiving a connecting pin to connect a crank to a link in the valve linkage system, wherein a connection between the crank and the link consists of one side of the crank interfacing with one side of the link such that there is a single connection at the pin bore of the crank to the link;an integral locking insert inside the pin bore;a shaft sleeve having a bore for receiving a shaft;an arm between the pin bore and shaft sleeve; anda first stiffening rib extending from the shaft sleeve toward the pin bore. 2. The system of claim 1, and further comprising: a second stiffening rib extending from the shaft sleeve toward the pin bore. 3. The system of claim 1, wherein the first stiffening rib is located above the arm and the second stiffening rib is located below the arm. 4. The system of claim 1, wherein the first stiffening rib is located above the arm. 5. The system of claim 1, wherein the integral locking insert comprises: a helical insert to hold a bolt connecting the crank to the link. 6. A linkage system for connecting a pneumatic actuation system to an air valve having a valve body connected to a rotatable shaft, the linkage system comprising: a clevis for connecting to the actuation system to be moved by the actuation system;a crank with a pin sleeve having a pin bore for receiving a connecting pin, a shaft sleeve having a bore for receiving the rotatable shaft, an arm between the pin bore and shaft sleeve and a first stiffening rib extending from the shaft sleeve toward the pin bore; anda link with a pin bore on one end for receiving the connecting pin and connecting to the clevis on an opposite end to move with the clevis and to move the crank,wherein a connection between the link and the crank consists of one side of the crank interfacing with one side of the link such that there is a single connection at the pin bore of the crank to the link, and wherein the pin bore includes a helical locking insert. 7. The linkage system of claim 6, wherein the connecting pin is a bolt and the connection includes a bushing. 8. The linkage system of claim 6, wherein the crank further comprises a second stiffening rib. 9. The linkage system of claim 8, wherein the first stiffening rib is located above the arm and the second stiffening rib is located below the arm. 10. The linkage system of claim 6, wherein the first stiffening rib is located above the arm. 11. A pneumatic air valve comprising: a pneumatic actuation system;a rotatable shaft;a rotatable valve body connected to the rotatable shaft; anda linkage system connecting the actuation system to the valve body, wherein the linkage system comprises a clevis for connecting to the actuation system to be moved by the actuation system; a crank with a pin sleeve having a pin bore for receiving a connecting pin, a shaft sleeve having a bore for receiving the rotatable shaft, an arm between the pin bore and shaft sleeve and a first stiffening rib extending from the shaft sleeve toward the pin bore; and a link with a pin bore on one end for receiving the connecting pin and connecting to the clevis on an opposite end to move with the clevis and to move the crank,wherein a connection between the link and the crank consists of one side of the crank interfacing with one side of the link such that there is a single connection at the pin bore of the crank to the link, and wherein the pin bore includes a helical locking insert. 12. The valve of claim 11, wherein the connecting pin is a bolt. 13. The valve of claim 11, wherein the crank further comprises a second stiffening rib. 14. The valve of claim 11, wherein the first stiffening rib is located above the arm and the second stiffening rib is located below the arm. 15. The valve of claim 11, wherein the first stiffening rib is located above the arm. 16. The valve of claim 11, wherein the actuation system comprises a plurality of pistons in cylinders. 17. The valve of claim 11, wherein the valve is a butterfly valve. 18. A method of installing a crank in a linkage system, the method comprising: aligning the pin bores of one side of a crank and one side of a link, wherein the crank comprises a pin sleeve having a pin bore for receiving a connecting pin, a shaft sleeve having a bore for receiving the rotatable shaft, an arm between the pin bore and shaft sleeve and a first stiffening rib extending from the shaft sleeve toward the pin bore;inserting bushing into the link pin bore;inserting and torqueing a bolt into the pin bores to connect the crank to the link, wherein the pin bore includes a helical locking insert and wherein a connection between the crank and the link consists of the one side of the crank interfacing with the one side of the link such that there is a single connection at the pin bores of the crank to the link; andsliding the bore of the crank shaft sleeve onto a rotatable shaft connected to a valve body.