Emerson 788 DVC manual Danieltm Model 788DVC Digital Control Valves

DANIELTM MODEL 788DVC DIGITAL CONTROL VALVES D E C 2012

5.4.2To upgrade existing valves having the original “AP” option (received prior to September 1992), the following parts have been supplied as a separate kit:

-washers (29)

-Stat-O-Seals (30)

-one gasket (31)

-three O-rings (replaces existing O-rings (3) and (4) of the same part numbers.)

Reference Figure 7-1 for complete valve part numbers.

5.4.3To upgrade existing “AP” units supplied prior to September, 1992:

a.Follow procedures described in Section 5-1 for general disassembly and Section 5-2 for Aggressive Products Cylinder disassembly.

b.Replace O-rings and install gasket, Stat-O-Seal and washers as required (reference Figure 7-1).

c.Complete cylinder assembly by installing piston and all component parts through the top of the cylinder housing.

Do not attempt to install the piston through the seat area. Attempts to assemble through the seat area will destroy the spring-loaded Teflon® cup-seals.

d.Secure cylinder assembly to cylinder heads using hand pressure or arbor press for ease of installation.

DISASSEMBLY AND REASSEMBLY 5-7