Emerson Spence K5 User manual

www.SpenceValve.comwww.SpenceValve.com

▲ 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.

Types K5 and K6

5 4 3

EA0170R1

450

400

350

300

250

200

150

100

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.

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.

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.

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

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

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.

Types K5 and K6

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.

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.

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.

Types K5 and K6

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