Executive Order VR-102-A
Static Torque of Rotatable Phase I Adaptors
Definitions common to all certification and test procedures are in:
D-200 Definitions for Vapor Recovery Procedures
For the purpose of this procedure, the term "CARB" refers to the California Air Resources Board, and the term "Executive Officer" refers to the CARB Executive Officer, or his or her authorized representative or designate.
PURPOSE AND APPLICABILITY
The purpose of this procedure is to quantify the amount of breaking torque required to start the movement of a rotatable Phase I adaptor. This procedure determines compliance with the performance specification required by CARB.
PRINCIPLE AND SUMMARY OF TEST PROCEDURE
A compatible dust cap is installed on a rotatable Phase I adaptor. A Torque Test Tool is installed on the dust cap and three static torque measurements are taken. If the resulting average static torque is less than, or equal to, the maximum allowable value specified in Certification Procedure CP-201, the adaptor is verified to be in compliance.
BIASES AND INTERFERENCES
Missing or defective gaskets in the dust cap may bias the results towards compliance as a dust cap may slip on the rotatable adaptor prior to the adaptor rotating. This bias is eliminated by ensuring that the dust cap seal is securely in place and does not show signs of excessive wear or damage.
Gasoline or other lubricants on the sealing surface of the rotatable adaptor or the dust cap seal can cause the dust cap to slip and may bias the results towards compliance. This bias is eliminated by ensuring that the sealing surface of the rotatable adaptor and dust cap is clean, dry and free of lubricants.
SENSITIVITY, RANGE, AND PRECISION
Torque Wrench. The maximum full-scale range shall be 250 pounds-inches with minimum accuracy of 3.0 percent full-scale and minimum readability of 5 pound-inch increments. The torque wrench shall incorporate a mechanism, such as a tell-tale needle, that identifies the maximum applied torque during each measurement.