Jflow controls JFD Series Guide

J Flow Controls, LLC
14 De Camp Cincinnati, OH 45216
Phone: [phone] Fax [phone]
JFD Series
Spring Return Diaphragm pneumatic actuator
This instruction is a guide for general installation,
operation, maintenance and storage for J Flow
Controls pneumatic diaphragm actuators. Please
follow instructions to ensure optimum performance
and Safety.
2) IMPORTANT SAFETY PROCEDURES
1) INTRODUCTION
6) ACTUATOR STROKE ADJUSTMENT
Air (or Medium supplied) to the Diaphragm
(17) casing pushes the actuator stem
downward. This action compresses the
spring, which in turn pushes the actuator
shaft (12) back up when the supply pressure
is decreased or lost.
Relieve trapped medium pressure within ball
valve or plug valve body cavities before
removing the actuator from valve assemblies
for maintenance.
JFD series actuators shall only be used as actuators
on valves or damper application. Levers, racks and
similar cannot be used to transmit movement without
protective equipment.
3) OPERATING MEDIUM, PRESSURE AND
TEMPERATURE
Travel Stops and Settings
5) OPERATING PRINCIPLE
OPERATION AND INSTRUCTION MANUAL
ALWAYS DISCONNECT AIR LINES AND
ELECTRICAL SOURCES PRIOR TO
PERFORMING MAINTENANCE ON THE
ACTUATOR
The spring shaft (12) trurns the drive stem (3)
90 degrees and creates a rotary motion.
Travel Stop and settings. Actuator with 90°
rotation, the stroke adjustment is +/- 4°
Operating medium:
Use air, gas, oil, and water.
Operating pressure
Do not exceed 100 PSI (7 bar)
Use standard seals and grease, the operating
temperature range is -4 (-20 ) to
+150 (+65C ).
For operating medium, pressure and temperature
outside these ranges, please
consult J Flow Controls.
4)LUBRICATION
Upper and Lower Adjusting screws to set
open and closed stops.

Remove Indicator (32) and Indicator screws
(31).
Drive assembly / Drive Body Cover
Spring return actuator:
Slowly remove the diaphragm cover screws
(19).
Remove the diaphragm (21) as needed.
Inspect the diaphgram for damage or wear
and replace as needed.
Remove actuator from the valve and valve
mounting bracket (if needed).
7) ACTUATOR DISASSEMBLY
EXTREME CAUTION SHOULD BE USED
WHEN DISASSEMBLING
SPRING DISASSEMBLY SHOULD NOT
BE ATTEMPTED.
THE SPRING ASSEMBLY IS UNDER
TENSION AND COULD POSE A DANGER
TO PERSONNEL.
Remove Diaphragm Bolt (27) and
diaphragm washer (28) to remove the
diaphragm.
It is recommeneded that the Spring assembly
be removed by J Flow Controls, LLC. If the
Spring Asssembly must be removed, please
contact J Flow Controls for detailed Instructions
on Safe Disassembly.
Remove Bolt Drive Body bolts (6) and
drive cap (2) to remove the
diaphragm.
Reverse side- Remove NAMUR Shaft
(25). The bolt holding the NAMUR
shaft in place may have to be
removed from either side (26).
Inspect the bearings (5) for excessive
wear. Replace as needed.
Drive Stem Removal
Loosen the lower (9) jam nut on the
stem. Using a wrench, hold the
square block adapter (8).
Using a Hex wrench, loosen the Drive
Pin (7). Using a wrench, hold the
square block adapter (8).
Remove the Drive Pin (7). Rotate the
drive arm away from the stem(8) and
block (9). Remove from housing.
Inspect the two TFE wear bearings (4).
Replace if needed.
Loosen the jam nuts (22) and Upper and
Lower adjusting screws counter- clockwise
(23) until the tension is removed.
CAUTION: TO REPAIR OR INSPECT
THE LOWER ASSEMBLY, SUPPLY
PRESSURE TO THE DIAHRAGM
MUST BE APPLIED (50%).
THE FOLLOWING SECTION SHOULD
ONLY BE ATTEMPTED IF THE
ACTUATOR IS "STICKING" OR IS IN
NEED OF INSPECTION

JFD ACTUATOR EXPLODED VIEW
NO. NAMEOFPARTS MATERIALS
1 DRIVEBODY DUCTILE 1
2 DRIVECAP ANSI1010 1
3 DRIVESTEM DUCTILE 1
4 BEARING -TFE-2
5 THRUSTWASHER POM 2
6 BODYBOLTS SS304 3
7 DRIVEPIN ANSI4135 1
8 ADAPTER ANSI1045 1
9 NUT 2H 2
10 BOLTS B7 6
11 SPRING(BASE) ANSI1010 1
12 SHAFT ANSI4135 1
13 SPRING(LARGE) JISSUP3 1
14 SPRING(SMALL) JISSUP3 1
15 SPRINGBOX ANSI1010 1
16 SPRINGCOVER ANSI1010 1
NO. NAMEOFPARTS MATERIALS
17 DIAPHRAGM RUBER 1
18 NUT 2H 12
19 BOLTS B7 12
20 SPRINGBRACKET DUCTILE 1
21 DIAPHRAGMCOVER ANSI1010 1
22 NUT CARBONSTEEL 2
23 ADJUSTBOLT CARBONSTEEL 2
24 BEARING -- 2
25 ADAPTER CARBONSTEEL 1
26 BOLT SS304 1
27 BOLT SS304 1
28 DIAPHRAGMWASHER SS304 1
29 BOLTS SS304 3
30 INDICATORPLATE ALUMINUM 1
31 BOLTS SS304 2
32 INDICATORPOINTER ALUMINUM 1
33 NYLONGUIDE NYLON 6

J Flow Controls, LLC
14 De Camp Cincinnati, OH 45216
Phone: [phone] Fax [phone]
J Flow Controls, LLC
4665 Interstate Dr. Cincinnati, OH 45216
Phone: [phone] Fax [phone]
Part# 40PSI 60PSI 80PSI
SpringEnd AirEnd SpringEnd AirEnd SpringEnd AirEnd
JFD115 135
inch
259
Inch
309
inch
309
inch
465
inch
319
inch
JFD300 695
inch
795
inch
1,385
inch
995
inch
1,795
inch
1,409
Inch
JFD515 3,179
inch
3,695
inch
4,865
inch
5,509
inch
6,765
inch
7,095
inch
TORqUES (IN-LbS):
J-Flow’sJFDSpring&DiaphragmActuatorforcompact,precisecontrolineasyeldchangeablefailopenand
failclosed.ActuatortovalvemountingcomplieswithISO5211standardandpositionermountingcomplies
withNAMURstandard.Threedifferentsizesareavailableforactuationupthrough12”J-FlowDM9900F
segmentedV-Ballcontrolvalves, and High Performance Butterfly Valves
8) Clockwise and Counter-Clockwise Rotation Set Up
Cast Side Cover Side
Clockwise Rotation
Counter- Clockwise on Fail
Counter - Clockwise Rotation
Clockwise on Fail
9)Storage
To preserve the actuator, ensure the plastic caps are installed to prevent dust
and other debris from entering the actuator. Ensure the Drive is covered with
plastic or the unit is boxed. Avoid direct sun exposure.