PVA 112-2190, Operation Manual, Page: 19 / 34

FCS300 Series Manual
Revision D /
June 2020
Page 19 of 34
Fluid Section
1. Drop the packing (14){14}[16]<15> into the fluid section (3){3}[3]<5>, and screw in the
packing nut (15){15}[17]<16> but leave finger tight until assembled with the air
section.
2. Mount the 007 Kalrez o-ring (20){21}[21] on the seat (4){4}[4] and thread the seat
into the fluid section. Tighten the two parts using an adjustable wrench on the fluid
section and soft tip pliers on the seat.
•
FCS300-ES-UF Only : Thread the seat<4> into the fluid body[3] by installing
the 007 Kalrez O-Ring[20] on the end of the seat[1]. Tighten into the fluid
body with an adjustable wrench.
3. Place the air cap (17){18}[6]<2> onto the fluid section over the seat then secure it by
threading the collar in place.
4. FCS300-ES-UF Only : Thread the atomizing air tips <5> on the air cap<6>.
Assemble Section
1. Be sure the micrometer adjustment {11}[12]<7> is backed out far enough so at least
the number 1 can be seen on the midsection (D).
2. Apply a small amount of silicone grease to the end of the needle then insert it into
the packing nut {6}[7]<16> and slide the two sections together.
3. Align the air holes of the air section on the same face as the atomizing air hole of
the fluid section then connect the sections using the two machine screws,
{21}[22]<10> tightening them down evenly using a 3/32” Allen key.
4. Using the tip of a 3/32” Allen key, tighten the packing nut.
Setting Micrometer to Zero
When assembling the valve it will be necessary to re-calibrate the micrometer adjust back
to the zero position.
1. Using the micrometer wrench (A), insert the inside tip of the small end into the
orifice of the midsection (D) and rotate it clockwise until the numbered centerline is
displayed on a side that can most easily be viewed by an operator.
Note: Valves are supplied from the factory with the center line located 90’ left of
the fluid inlet.