Flowserve 400MD Logix - Manual (Page 92)

• Send a 50 percent command.
• Set integral to zero.
• Locate the DAC_PERCENT
• Write this percentage value to IL_OFFSET.
• Write original value to Integral
Table 10.13 Logix 3400MD Digital Positioner Factory Tuning Sets
Brand Tuning Set GAIN_LOWER GAIN_UPPER GAIN_MULT lgain Comparable
Actuator
Valtek VFactory_A 1.00 2.00 0.05 10.0 25 sq. in.
VFactory_B 1.00 2.50 0.05 10.0 50 sq. in.
VFactory_C 2.00 3.00 0.05 10.0 100 sq. in.
VFactory_D 4.00 5.00 0.05 10.0 200 sq. in.
VFactory_E 4.00 7.00 0.05 10.0 300 sq. in.
Kammer Trooper 48 0.40 0.50 0.05 25.0 31 sq. in.
Trooper 49 3.00 4.00 0.05 10.0 77.5 sq. in.
Automax R1 0.30 0.50 0.05 10.0 3 to 5 sq. in.
R2 1.00 1.50 0.05 10.0 9 to 12 sq. in.
R3 1.30 2.00 0.05 10.0 16 to 19 sq. in.
R4 2.00 2.50 0.05 10.0 27 to 37 sq. in.
R5 2.50 3.60 0.05 10.0 48 to 75 sq. in.
R6 4.00 5.00 0.05 10.0 109 sq. in.
Spool Valve
The spool valve is a four-way directional valve with precision features to provide optimal control and low air consumption. To help prevent spool valve
malfunction, the positioner supply air must conform to ISA Standard S7.3 (a dew point at least 18 degrees below ambient temperature, particle size
below 1 microns, oil content not to exceed 1 part per million). Flowserve’s standard coalescing filter is highly recommended to help meet these require-
ments.
Small particles, oil that has varnished, corrosion, ice, burrs, and extreme wear could cause the spool valve to act abnormally. If the spool valve
is suspected of sticking, it can be inspected by performing the following.
1. Make sure the valve is bypassed or in a safe condition.
2. Disconnect the power and air supply to the unit.
3. Remove the spool valve cover by removing the screw and sliding the cover assembly backwards until the tab is clear of the slot.
4. Inspect the coalescing filter element in the spool valve cover for signs of oil, water and debris that may have come from the air supply. A clean filter
is white.
5. Remove the two phillips-head screws holding the spool valve to the housing. Inspect the free movement of the spool by carefully sliding the block up
and down on the spool about 0.25 inches. The block should slide on the spool with no resistance. Carefully remove the block, ensuring it is removed
concentric with the spool.
6. Inspect the block and spool for oil, water, debris and wear. If oil, water and/or debris are found, the spool and block can be cleaned with a
non-residue cleaner, lint-free cloth and soft bristle brush. If wear is found, replace the driver module assembly per the IOM manual.
7. Before re-assembly, verify that the three O-rings are in the counter-bores on the machined platform where the spool valve block is to be
placed.
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
92