Emerson Spence K5 User manual

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▲ WARNING
Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion,
re and/or chemical contamination
causing property damage and personal
injury or death.
Emerson Control Valve must be
installed, operated and maintained
in accordance with federal, state and
local codes, rules and regulations
and Emerson Process Management
Regulator Technologies, Inc.
(Emerson) instructions.
If the control valve vents gas or a
leak develops in the system, service
to the unit may be required. Failure
to correct trouble could result in a
hazardous condition.
Installation, operation and maintenance
procedures performed by unqualied
personnel may result in improper
adjustment and unsafe operation. Either
condition may result in equipment
damage or personal injury. Only a
qualied person shall install or service
the Types K5 and K6 control valve.
Introduction
Scope of the Manual
This manual provides instructions for the installation,
start-up, setting, maintenance, troubleshooting and
parts ordering for Types K5 and K6 control valve and
Type SKD62U Electric Actuator.
Spence Types K5 and K6 Control Valve
Figure 2. Type SKD62U Electric Actuator.
Figure 1. Types K5 and K6 Control Valves
Instruction Manual
VCIMD-14946 Types K5 and K6
November 2021

Types K5 and K6 Control Valves
Control Valve Types
Type K5: Single-seat bronze with union ends and
electric actuator, Fail-closed
Type K6: Single-seat bronze with union ends and
electric actuator, Fail-open
Control Valve Sizes
NPS 1/2, 3/4, 1, 1-1/4, 1-1/2 and 2 /
DN 15, 20, 25, 32, 40 and 50
Pressure and Temperature Chart(1)
See Figure 4
End Connection Styles
Union Ends
Flow Coe󰀩cient, Cv
NPS 1/2 / DN 15: 5.2
NPS 3/4 / DN 20: 7.0
NPS 1 / DN 25: 11
NPS 1-1/4 / DN 32: 20
NPS 1-1/2 / DN 40: 25
NPS 2 / DN 50: 30
Construction Materials
Body: Bronze
Seat: Stainless steel
Bonnet: Ductile iron
Plug, Stem and Stem Assembly: Stainless steel
Stem Guide: Stainless steel, Monel®or Brass
Casing: Aluminum
Yoke: Aluminum
Applicable Codes
Meets or exceeds ANSI B16.151 Class 125
ANSI/FCI 70-2 Class IV
Approximate Weight
See Table 1
Type SKD62U Electric Actuator
Power Supply
Operating voltage: 24 Vac ± 20%
Frequency: 50/60 Hz
Power consumption: 18 VA
Type SKD62U Electric Actuator (continued)
Control Signals
Control Input (Y)
Voltage: 0 to 10 Vdc
Current: 0.1 mA max.
Control Input (R)
Resistance: 0 to 1000 ohms
Voltage: 0 to 1.6 V
Current: 4 to 20 mA
Maximum impedance: 250 ohms
Control Output (U)
Voltage: 0 to 10 Vdc
Current: 0.5 mA max, 4 to 20 mA
Maximum impedance: 250 ohms
Function
Nominal stroke: 3/4 in. / 20 mm
Run time with control operation (full stroke)
Power stroke, 0 to 100%: 30 seconds
Return stroke, 100 to 0%: 15 seconds
Nominal Force
NC and 3-Way upper: 0% Stroke, 225 lbs /
1000 N Force
NO and 3-Way by-pass: 100% Stroke, 258 lbs /
1150 N Force
Agency Certication
UL®listed to UL873
C-UL certied to Canadian standard
C22.2 No. 24-93
Ambient Conditions
Ambient Temperature: 5 to 130°F / -15 to 55°C
Media Temperature: 14 to 300°F / -10 to 150°C
Conduit opening
1/2 in. NPSM
Weight
7.5 lbs / 3.4 kg
Housing Enclosure
NEMA-1
Accessories
Auxillary switch
Specications
This section lists the specications for the Types K5 and K6 and Type SKD62U Electric Actuator. Factory
specication are stamped on the nameplate fastened on the control valve and actuator at the factory.
1. The pressure/temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded.
Monel®is a mark owned by Special Metals Corporation.
UL®is a mark owned by Underwriters Laboratories.
2
Types K5 and K6

5 4 3
EA0170R1
450
400
350
300
250
200
150
100
50
0
450400350300250200150100500
PRESSURE, psi
TEMPERATURE, °F
ANSI/ASME B16.15 CLASS 250
SATURATED STEAM
Figure 4. Types K5 and K6 Pressure and Temperature ChartFigure 3. Auxillary Switch
Table 1. Types K5 and K6 Approximate Weight
Product Description
Types K5 and K6 Control Valves
Types K5 and K6 control valves are designed for
economical control of steam, water, gas and industrial
processes. Type K5 is fail-closed and Type K6 is fail-
open. The electric actuator accepts a variety of input
signals to meet most application requirements.
Types K5 and K6 are designed and manufactured in
accordance with Article 3, Section 3 of the Pressure
Equipment Directive.
Type SKD62U Electric Actuator
The Spence Electronic Valve Actuator requires a
24 Vac supply and receives a 0 to 10 Vdc, 4 to 20 mA
or 0 to 135 Ohm control signal to proportionally control
a valve.
VALVE SIZE WEIGHT
NPS DN lbs kg
1/2 15 13 6
3/4 20 13 6
1 25 17.5 8
1-1/4 32 23.5 11
1-1/2 40 23.5 11
2 50 25.5 12
Types K5 and K6 Control Valve
Principle of Operation
The Types K5 and K6 Control Valves are flow to open,
globe style, electric-actuated control valves. On loss of
signal, Type K5 is fail closed and Type K6 is fail open.
A controller sensing the controlled variable provides a
signal to the actuator to obtain the desired control.
Accessory such as ASC1.6 auxillary switch is
available. The switch sends a signal to indicate that
the value is in the 0% stroke position. The switching
point is xed at the 0% stroke position. Switching
capacity is 24 Vac, 4 A resistive and 2 A inductive. Its
lowest recommended current is 10 mA.
This actuator is designed to work with Types K5 and
K6 Control Valves.
3
Types K5 and K6

SPENCE
STEAM
TRAP
SPENCE
UNIFLEX
UNION
SPENCE
K5 AND K6
CONTROL
VALVE
SPENCE
UNIFLEX
UNION
SPENCE
STEAM
TRAP
SPENCE
STEAM
TRAP
SPENCE DRIP
PAN ELBOW
SPENCE SAFETY
RELIEF VALVE
Figure 5. Types K5 and K6 Control Valve Recommended Installation for Steam Application
△ CAUTION
The piping system must be
adequately designed and supported
to prevent extraordinary loads to the
pressure equipment.
Planning
• Locate the valve in a straight run of horizontal
pipe as shown in Figure 5. Mount the valve with
the actuator in the upright position. Allow room for
removal of the actuator.
• Prevent pipeline hammering in compressible fluid
service by providing proper drainage before and
after the valve.
• Avoid damaging effects of scale and dirt in pipelines
by using a strainer.
• A three-valve by-pass to facilitate inspection
and maintenance without interrupting service
is recommended.
Installation
▲ WARNING
Personal injury or system damage may
result if this control valve is installed,
without appropriate overpressure
protection, where service conditions
could exceed the limits given in the
Specications section and/or control
valve nameplate.
Additionally, physical damage to the
control valve may result in personal
injury or property damage due to
escaping of accumulated gas. To avoid
such injury and damage, install the
control valve in a safe location.
All pressure equipment should be installed
in a non-seismic area; should not be
exposed to re; and should be protected
from thunderbolt (lightning) strikes.
4
Types K5 and K6

• To eliminate excessive noise with steam and other
compressible uids, enlarge the delivery pipe size
to allow a reasonable ow velocity at the reduced
pressure. A concentric transition is recommended.
• If possible, avoid sharp turns close to the valve.
• Install upstream and downstream pressure gauges
to indicate performance.
• If the rating of the delivery system or connected
equipment is less than the initial pressure, provide
a safety relief valve.
• Use Uniflex Pipe Coupling for ease of maintenance.
The spiral wound gasket provides a high
performance seal similar to that of a flanged
connection, yet retains the convenience of a ground
joint union.
Start-up and Setting
▲ WARNING
The valve may be handling hazardous
fluids. Only qualified personnel, who are
familiar with the installation, should be
permitted to install, readjust, inspect or
maintain the valve.
△ CAUTION
Insulation, may be applied to the valve
body only. Do not insulate the bonnet.
1. Flush the piping system thoroughly to clear it of
welding beads, scale, sand, etc.
2. Install the valve with the arrow on the side of the
valve body pointing in the direction of fluid flow.
3. Install controller and accessories in accordance
with instructions furnished by the manufacturer of
these items.
4. Connect necessary electrical connections to
the actuator.
Maintenance
▲ WARNING
To avoid personal injury, property damage
or equipment damage caused by sudden
release of pressure or explosion of
accumulated gas, do not attempt any
maintenance or disassembly without
rst isolating the control valve from
system pressure and relieving all internal
pressure from the control valve.
Control valves that have been
disassembled for repair must be tested
for proper operation before being returned
to service. Only parts manufactured by
Emerson should be used for repairing this
control valve.
Due to normal wear or damage that may
occur from external sources, this control
valve should be inspected and maintained
periodically. The frequency of inspection
and replacement of parts depends upon
the severity of service conditions or the
requirement of local, state and federal
rules and regulations.
Removal of the Actuator from the Valve
Body Assembly (Refer to Figures 21 to 24)
1. Close inlet and outlet stop valves.
2. Be sure valve body is not under pressure.
3. Remove all accessories from the control valve.
4. Loosen stem nuts and move them down
valve stem.
5. Apply 50% signal to energize the actuator.
6. Loosen the actuator stem retainer nuts until the
stem adapter groove is disengaged from the stem
retainer.
7. De-energize the actuator. The actuator stem
retainer should move away from the valve stem.
8. Loosen the actuator yoke nuts and lift the actuator
o󰀨 the locking nut. Care must be taken to prevent
the disk from rotating on the seat.
5
Types K5 and K6

Disassembly of the Valve Body
1. Remove the stem adapter, stem nuts (key 24) and
locking nut.
2. To complete body disassembly, unscrew the
bonnet (key 25) for Types K5 and K6 and the cap
(key 31) with guide (key 38) for the Type K5.
3. Turn the stem and plug assembly out of the
bonnet through the packing. Replace the packing
if necessary.
4. Inspect all parts for wear and cleaned thoroughly
before re-assembling the valve body.
Lapping Plug into the Seat
△ CAUTION
Seats and plugs should never require
more than the lightest touch up with very
fine (400 grit) grinding compound. Heavy
lapping will produce galling, a wider
seating surface and a groove in the plug,
all of which tend to cause leakage.
1. Reface a damaged surface before attempting to
grind it in. Lap sparingly.
2. Replace stem and plug assembly (key 39) in
bonnet (key 25) through packing .
3. Apply lapping compound to the plug.
4. Place bonnet and bonnet flange on the body.
5. After lapping, disassemble and clean all
parts thoroughly.
Packing Replacement
1. Check stem for gouges if packing leaks.
2. Install replacement packing cartridges.
Reassembly of the Valve Body
1. Tighten the bonnet (key 25) to the body.
2. Replace locking nut and stem nuts (key 24) over
the stem (key 34).
3. Replace the guide (key 38) and cap (key 31) for
Type K5.
Replacing the Actuator on the Valve
Body (See Figures 21 to 24)
1. Thread the stem adapter all the way onto the
valve stem.
2. Position the electric actuator on the actuator
locking nut. Make sure the actuator yoke nuts are
loose enough to allow the actuator to slip over the
locking nut.
3. Position the actuator so that the control box is
facing the front of the valve (with Spence logo).
4. Hold the actuator in place while tightening the
yoke nuts. Care must be taken to prevent the disk
from rotating on the seat.
5. Turn the stem adapter upward until the groove
engages with the actuator stem retainer. While
making this adjustment, make sure that the valve
stem is all the way up.
6. Tighten the stem retainer nuts.
Actuator Adjustment
Type K5 Reverse Acting - Fail Closed
1. Before calibrating the actuator, check for
valve seat leakage to assure conformity to the
requirements of ANSI/FCI 70-2 of Class IV with
metal-to-metal trim.Test media should be air with
an upstream pressure of 50 psi / 3.45 bar and a
downstream pressure of atmospheric.
2. If seat leakage exceed class IV rating, turn the
actuator manual override knob clockwise to lift the
disk o󰀨 the seat.
3. Loosen the stem nuts and turn valve stem upward
as required.
4. Retighten the stem nuts against the stem adapter.
5. Turn the actuator manual override knob
counterclockwise until the red indicator
disappears.
6. Recheck the valve seat leakage.
7. Repeat steps as required until the valve seat
leakage is within class IV rating.
Type K6 Direct Acting - Fail Open
1. After calibrating the actuator, check for valve seat
leakage to assure conformity to the requirements
of ANSI/FCI 70-2 of Class IV with metal-to-metal
6
Types K5 and K6

ACTUATOR
SKD620
ACTUATOR
SKD620
STROKE LIMITER
ASZ62.6
4-20 mA CONTROLLER
FOR INPUT SIGNAL
ANALOG SCALING
MODULE ASM1
ANALOG SCALING
MODULE ASM1
SIGNAL
POTENTIOMETER
0-135 OHM
0-10vDC
SIGNAL
INPUT
24 VAC
24 VAC
24 VAC
KEY FOR FIGURE 6
Use earth ground isolating step-down Class 2
transformer per Siemens SKD62U actuator instructions.
OPERATING VOLTAGE 24 vAC
G System Potential (SP)
GO System Neutral (SN)
Y Control Input 0-10 vDC
R Input for 4-20 mA or 0-1000 ohm Remote
Setting Unit
M Measuring Neutral
U Output for 0-10 vDC or 4-20 mA Measuring
Voltage
1 System Potential (SP)
2 Common for Power Supply, Input Signal, Output
Signal
4 Input Signal, 4-20 mA
5 Output Signal, 0-4 vDC
Figure 6. Signal Card Wiring
FIGURE 6A
FIGURE 6B
FIGURE 6C
trim. Test media should be air with an upstream
pressure of 50 psi / 3.45 bar and a downstream
pressure of atmospheric.
2. Apply full signal to the actuator to close the valve
and measure the valve seat leakage.
3. If the seat leakage exceeds class IV rating, apply
50% signal to lift the disk o󰀨 the seat.
4. Loosen the stem nuts and turn the valve stem
downward as required.
5. Retighten the stem nuts against the stem adapter.
6. Apply full signal to the actuator to close the valve
and recheck valve seat leakage.
7. Repeat steps as required until the valve seat
leakage is within Class IV rating.
Types K1 and K5 Signal Card Wiring
0 to 10 vDC (See Figure 6C)
1. Remove the electric actuator control box cover
and install the stroke limiter to terminals 'G',
'Y' and 'M' on the circuit board and tighten the
terminal screws.
2. Follow the wiring as shown in Figure 6C.
3. Set the input signal to 10 VDC.
4. Turn the stroke limiter potentiometer
counterclockwise to 0% stroke.
5. Gradually turn the potentiometer clockwise until
the total valve travel is within 10% of rated travel.
4 to 20 mA
1. Remove the electric actuator control box cover
and wire electric actuator and analog scaling
module according to Figure 6A.
2. Set the input signal to 20 mA.
3. Adjust the span potentiometer on the analog
scaling module until the total valve travel is within
10% of rated travel.
4. Set the input signal to 4 mA.
5. Adjust the zero potentiometer on the analog
scaling module until the voltage across the
actuator terminals 'Y' and 'G0' measures zero.
6. Set the input signal to 20 mA and recheck the
valve travel.
7. Readjust the Zero and Span potentiometers
as required.
8. Use a mounting screw to secure the analog
scaling module to the actuator.
7
Types K5 and K6

7
1
5
4
3
2
6
8
EA0389R1
EA0422R1
T 10
(2 mm)
Figure 7. Type SKD62U Electric Actuator Parts
LEGEND
1 PRESSURE CYLINDER
2 PISTON
3 OSCILLATING PUMP
4 RETURN SPRING
5 BYPASS VALVE
6 VALVE STEM RETAINER
7 MANUAL OVERRIDE KNOB
8 POSITION INDICATOR
Figure 8. Adjusting the Position Feedback Signal
0 to 135 Ohm
1. Remove the electric actuator control box cover
and wire electric actuator and analog scaling
module according to Figure 6B.
2. Set the signal potentiometer to 135 ohm.
3. Adjust the span potentiometer on the analog
scaling module until the total valve travel is within
10% of rated travel.
4. Set the signal potentiometer to zero ohm.
5. Adjust the zero potentiometer on the analog
scaling module until the voltage across the
actuator terminals 'Y' and 'G0' measures zero.
6. Set the signal potentiometer to 135 ohm and
recheck the valve travel.
7. Readjust the Zero & Span potentiometers
as required.
8. Use a mounting screw to secure the analog
scaling module to the actuator.
Changing Signal Input
From 0 to 10 vDC to 4 to 20 mA or 0 to
135 Ohm:
1. Remove the electric actuator control box cover.
Loosen terminal screws for terminals 'G', 'Y' and
'M' on the circuit board and remove the stroke
limiter card (P/N 05-17401-00).
2. Follow the calibration procedure for the 4 to 20 mA
option (signal card P/N 05-17402-00) or the 0 to
135 ohm option (signal card P/N 05- 17382-00).
3. Secure signal card to actuator using a mounting
screw supplied with card.
From 4-20 mA or 0-135 Ohm to 0-10 vDC:
1. Remove the electric actuator control box cover
and remove the signal card.
2. Install the stroke limiter card (P/N 05-17401-00) to
terminals 'G', 'Y' and 'M' on the circuit board and
tighten the terminal screws.
3. Follow the calibration procedure for the
0 to 10 VDC option.
8
Types K5 and K6

EA0387R1
3/4 IN. / 20 mm
Figure 9. Valve Stem Travel Indication
From 4 to 20 mA to 0 to 135 Ohm or 0 to
135 Ohm to 4 to 20 mA:
1. Remove the electric actuator control box cover
and remove the signal card.
2. Follow the calibration procedure for the 4 to 20 mA
option (signal card P/N 05-17402-00) or the 0 to
135 ohm option (signal card P/N 05-17382-00).
3. Secure signal card to actuator using a
mounting screw.
4. After replacement of signal cards, recheck valve
seat leakage according to procedure given in the
actuator adjustment section for Types K5 and K6.
Troubleshooting
▲ WARNING
To avoid personal injury, property damage
or equipment damage caused by sudden
release of pressure or explosion of
accumulated gas, do not attempt any
troubleshooting or disassembly without
rst isolating the control valve from
system pressure and relieving all internal
pressure from the control valve.
Control valves that have been
disassembled for repair must be tested
for proper operation before being returned
to service. Only parts manufactured by
Emerson should be used for repairing this
control valve.
9
Types K5 and K6

EA0410R1
Figure 10. Acceptable Mounting Positions
To troubleshoot the valve and actuator, check for
the following: change in operating conditions; signal
failure; power failure; foreign matter lodged between
seat ring and plug; packing leakage.
Type SKD62U Electric Actuator
Principle of Operation
The actuator accepts a 0 to 10 Vdc, 0 to 135 or a 4
to 20 mA control signal. The actuator, mounted on
a valve, produces a stroke proportional to the input
signal. When power is turned off or the event of a
power failure, the actuator spring returns the valve to
its normal position.
Mounting and Installation
▲ WARNING
Personal injury or system damage
may result if this electric atuator is
installed where service conditions
could exceed the limits given in the
Specications section.
Installation, operation and maintenance
procedures performed by unqualied
personnel may result in improper
adjustment and unsafe operation. Either
condition may result in equipment
damage or personal injury. Only a
qualied person shall install or service
this electric actuator.
The vertical position is the recommended position
for mounting. The acceptable mounting positions are
shown in Figure 10.
Allow 4 in. / 100 mm around the sides and back of the
actuator and 8 in. / 200 mm above and to the front of
the actuator.
Detailed installation instructions for field mounting are
shipped with the actuator.
Startup
Note
The valve body assembly determines the
complete assembly action.
Check the wiring for proper connections.
10
Types K5 and K6