Elkhart Brass Unibody Valve - Manual (Page 22)

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ELKHART BRASS MANUFACTURING COMPANY, INC
4. Slow Close Adjustment
1. Loosen the socket head cap screw and two set screws.
Figure 25
2. Use a 1-3/8" wrench to adjust the slow close. (Note that a 3" or larger valve cannot be
actuated to close or open in less than three seconds per NFPA 1901.) Turning the cover
clockwise will reduce the speed at which the valve can be actuated. Turning the cover
counterclockwise will increase the speed at which the valve can be actuated.
Figure 26
3. Once proper adjustment has been achieved, tighten the socket head cap screw and both set
screws firmly.
Cap screw
Slower
Faster
Set screws