Dyna-Flo Control Valve Services Ltd.
Phone: 780
•
469
•
4000 Toll Free: 1
•
866
•
396
•
2356 Fax: 780
•
469
•
4035 Website: www.dyna
fl
o.com
Model 380 Control Valve
(8 Inch Only)
P-388M0319A
4
Operation, Parts, and Instruction Manual
UNPACKING VALVE FROM SHIPPING CONTAINER
Check the packing list, verify that the list includes all the materials in the shipping container before unpacking. Valve
information can be found on the nameplate (Key 33). Refer to Figure 3 and xx for possible nameplate locations.
When lifting the valve from shipping container, place properly rated lifting straps securely around the neck of the actuator,
refer to Figure 3 for strap placement. Straps should be placed to avoid damage to tubing and other mounted accessories.
For valve assemblies without an attached actuator, use caution when lifting or positioning straps so as not to damage the valve
stem.
Lift the valve/actuator assembly using proper lifting techniques.
WARNING:
The following maintenance procedures require removing the control valve from service. To avoid personnel injury, only
quali
fi
ed technicians should perform the following procedures. Always ensure the control valve is fully released of pressure or process
fl
uid before starting maintenance.
INSTALLATION
Before installing the valve, clean dirt, welding chips, scale or other foreign material from the line.
Inspect
fl
ange gasket surfaces for damage.
Check packing box bolting for proper tightness. Packing nuts should be slightly over
fi
nger-tight; however, tighten only as necessary
to prevent stem leakage.
If the valve has small internal
fl
ow passages such as anti-cavitation or low-noise trim the installation of an upstream strainer should
be considered to prevent clogging of these small passages.
CAUTION:
Do not over tighten packing! This can cause excessive packing wear and high stem friction that may impede stem
movement! Refer to Table 5 for Packing Nut Torque.
1
Install the valve with
fl
ow through the valve in the direction indicated in Speci
fi
cations (Page 3). The valve assembly may be
installed in any position unless limited by vibration considerations.
CAUTION:
The normal position of the actuator is vertical above the valve body. In some non-vertical applications, the
actuator may need to be supported.
WARNING:
Keep hands, hair and clothing away from all moving parts when operating the valve! Serious injury can result from
failure to do so!
2
When possible, stroke the valve and check for smooth operation through the full-stroke. Unsteady valve stem movement could
be an indication of an internal problem.
Air Piping
The actuators are designed to accept 1/4” NPT connection. Use 3/8” OD tubing (or equivalent) for all air lines. All connections must
be free of leaks.
CAUTION
: Do not exceed maximum casing pressure indicated on name plate located on the yoke of the actuator or in the Technical
(Sales) Bulletin appropriate for the actuator type.
