Design requirements
Fivalco butterfly valve should be connected to the piping system with approved couplings or flanges. Flow may be from either direction,
and the valves may be positioned in any direction.
Fivalco butterfly valves have been designed with a slow close handwheel operator, which effectively minimizes water hammer. These
valves feature minimum flow restriction and pressure loss when in the fully open position.
Installation
When the valves are received from the manufacturer they should be handled carefully to avoid breakage and damage to the seating
area. Before installation of the valves, clean piping, flange and coupling. When the valves close hard, it is usually due to debris lodged in
the seating area. Often this may be corrected by backing off the handwheel and closing again.
The valve should never be forced to seat by applying a wrench to the handwheel as this may distort the valve components or score the
sealing surface. Care must be taken to align wafer valves correctly so that the disc operation to the fully open position will not be
obstructed. The use of excessive force to open or close the valve violates all warranties whether express or implied.
The inlet and outlet pipe adjacent to the valve should be properly supported to prevent excessive stress on the valve body. The valve
should not be used to force a pipeline into position as this may result in distortion of the valve body.
Care and Maintenance
Fivalco butterfly valves require no regular maintenance, however, it is advisable to inspect and verify proper operation of the unit
annually or in accordance with the requirements of the authority having jurisdiction.
The inspection should include a visual check for leakage at the valve pipe connection and body to operator connection. Inspection and
maintenance should be performed by a qualified inspection service.
Switch Installation
Fivalco butterfly valves are provided with internal supervisor position switches. The tamper switch operates by a cam connected to the
valve stem. The switch will change position and close with two (2) full turns of the handwheel from the fully open position.
Switch 1#
For connection to the supervisory circuit
Normally Open: 1 Yellow
Normally Closed: 1 Red
Common: 1 White Switch 2#
Auxiliary switch connected per authority
Normally Open: 1 Blue
Normally Closed: 1 Orange
Common: 1 Black
Ground Lead: 1 Green |
Specification Download
