SPX APV DELTA DF plus 2 Operating Manual

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Page 1

Operating Manual

D E L T A D F p l u s 2

Double Seat Valve

Read and understand this manual prior to operating or servicing this product.

Page 2

Page 3

Page 4

Page 5

1. General Terms 2

2. Safety Instructions 2

3. Mode of Operation 3 - 4

4. Auxiliary Equipment 5 - 6

5. Cleaning 7 - 8

6. Installation 9

6.1 Welding Instructions 9

7. Dimensions / Weights 10

8. Technical Data 11 - 12

9. Materials 12

10. Maintenance 13

11. Service Instructions 14 - 18

12. Actuator 18

13. Assembly Tool 19

14. Detection of Seal Damage 20

(Trouble Shooting)

15. Spare Parts Lists

DFplus2 FS-A12 1,5”-4”, 6” RN 01.053.80-1

Actuator RN 01.053.22

Table of Contents : Page :

Double Seat Valve DELTA DFplus2 Operating Manual: rev. 1

DELTA DFplus2 - UK1 / qxd.12.2004

Page 6

Page 7

This operating manual should be read carefully by the competent operating and maintenance personnel.

We point out that we will not accept any liability for damage or malfunctions resulting from the non-compliance with this operating manual.

Descriptions and data given herein are subject to technical changes.

2. Safety Instructions

DANGER!

- The line and cleaning system must be depressurized before any maintenance work.

- Electric and pneumatic connections must be separated.

- Risk of injury by sudden valve actuation!

- Observe service instructions to ensure safe maintenance of the valve.

- During valve actuation and during shaft lifting, operating leakages spirt out to the bottom!

- Cleaning connections which are not used must be sealed by a plug.

- The spring actuator is under spring load, do not open it!

1. General Terms

Double Seat Valve DELTA DFplus2 Operating Manual: rev. 1

DELTA DFplus2 - UK1 / qxd.12.2004

Page 8

3. Mode of Operation

Due to its construction and mode of operation as well as to the use of high-quality stainless steel and adequate seal materials, the double seat valve DFplus2 is suited for the food and beverage industries as well as for pharmaceutical and chemical applications.

- The valve opens from the top to the bottom.

- Separation of two line sections by two valve disks with intermediate flushable leakage chamber. Cleaning connection at (D) with ½" clamp connection.

- Double sealing function by two independently acting seals.

- Any leakages at the valve seats are discharged at (F) in depressurized state.

- Valve feedback switches can be installed at (E).

- Actuation by pneumatic actuator with air connection at (C). Reset by spring force.

- The double seat valve is generally mounted in the actuator design "fail-up" (air-to-lower, spring-to-raise). With air failure, the valve moves into the safety limit position "closed".

- For seat cleaning purposes a seat lift actuator can be mounted on the actuator.

- Seat lift actuator

connection A = lifting of lower valve seat connection B = lifting of upper valve seat

seat lift

actuator

coupling

housing

leakage

chamber

Double Seat Valve

DELTA DFplus2

Operating Manual: rev. 1

DELTA DFplus2 - UK1 / qxd.12.2004

Page 9

3. Mode of Operation

Valve in closed position

The upper and lower valve shaft are closed by spring force. The different liquids A and B are safely separated from one another. The leakage chamber which is situated between the two valve shafts, provides for a free and depressurized drain to the bottom.

Valve in open position

The upper valve shaft is pressed against the seal of the lower valve shaft and out of its seat by control of the actuator. At the same time, the leakage chamber is closed against the product chamber. The two valve shafts move to the bottom into the open position. Pipelines A and B are connected.

upper

valve shaft

lower

valve shaft

leakage

chamber

Double Seat Valve DELTA DFplus2 Operating Manual: rev. 1

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Page 10

Seat lift actuator

- If necessary for reasons of process technology or hygiene, the DFplus2 valve can be equipped with a seat lift actuator. The upper and lower valve seats can be lifted individually by the seat lift actuator. Through the lifting of the individual valve seats the seal surfaces and the leakage chamber are cleaned.

Valve feedback (standard)

- Switches to signal the limit position of the closed and open valve position can be installed in the yoke area if requested. We recommend our APV standard types.

Operating distance: 5 mm / diameter: 11 mm. If the customer decides to use valve feedback switches other than APV type, we cannot take over the liability for any malfunctions.

Valve feedback according to PMO

- The limit position of the upper and lower valve shafts can be interrogated individually.

- Switches to signal the limit position can be mounted in the yoke area or at the housing cover if requested.

The following feedback kits are available:

1. Inquiry of upper and lower valve shaft closed. Prox. switch kit DFplus2 24 VDC closed

ref-No.:000 - 08 - 60 - 415/93

2. Inquiry of upper and lower valve shaft closed as well as valve open.

Prox. switch kit DFplus2 24 VDC closed + open

ref-No.:000 - 08 - 60 - 416/93

4. Auxiliary Equipment

valve feedback

PMO

seat lift

actuator

Double Seat Valve

DELTA DFplus2

Operating Manual: rev. 1

DELTA DFplus2 - UK1 / qxd.12.2004

Page 11

+ proximity switch holder

2 x ref-No.: 15 - 33 - 914/83

Control Unit

- The assembly of a CU3 Control Unit on the DFplus2 valve is possible.

- For the assembly of a control unit on the actuator or seat lift actuator corresponding adapters are required.

Different designs are available:

Standard Control Unit + Adapter (inquiry of valve position open and closed)

Control Unit according to PMO + Adapter (inquiry of upper and lower valve shaft closed)

4. Auxiliary Equipment

control unit DELTA CU3

1 solenoid valve (EMV) 3 solenoid valves (EMV)

(without seat lifting) (with seat lifting)

Direct Connect 24V CU31 Direct Connect CU33 Direct Connect ref-No.: 16 - 31 - 260/93 16 - 31 - 263/93

Device Net CU31 Device Net CU33 Device Net ref-No.: 16 - 31 - 264/93 16 - 31 - 267/93

AS - Interface CU31 AS - Interface CU33 AS - Interface ref-No.: 16 - 31 - 268/93 16 - 31 - 271/93

adapter CU Adapter D2 CU33 Adapter DFplus2 ref-No.: 08 - 48 - 429/93 16 - 00 - 205/93

1 solenoid valve (EMV) 3 solenoid valves (EMV)

(without seat lifting) (with seat lifting)

Direct Connect 24V CU31 Direct Connect CU33 Direct Connect

ref-No.: 16 - 31 - 786/93 16 - 31 - 804/93

Device Net CU31 Device Net CU33 Device Net

ref-No.: 16 - 31 - 785/93 16 - 31 - 805/93

AS - Interface CU31 AS - Interface CU33 AS - Interface

ref-No.: 16 - 31 - 787/93 16 - 31 - 806/93

Adapter CU31 Adapter DFplus2 CU33 Adapter DFplus2

ref-No.: 16 - 00 - 204/93 16 - 00 - 205/93

Double Seat Valve DELTA DFplus2 Operating Manual: rev. 1

DELTA DFplus2 - UK1 / qxd.12.2004

Page 12

5. Cleaning

With the cleaning of the DFplus2 valves it is necessary to distinguish between three areas:

The flow area

The upper and lower passages are cleaned by the flowing cleaning liquid during the cleaning of the connected pipelines.

The seal surfaces in the seat area

The seat seals (7) and (5) are cleaned through valve actuation and lifting of the individual valve seats during the cleaning of the resepective passage. The seal surfaces are flushed and cleaned by the cleaning liquid.

The leakage chamber

The cleaning of the leakage chamber is effected by CIP spraying. Cleaning connection (D).

Spraying does not produce pressure built-up in the leakage chamber and should preferably be undertaken in closed valve position. The flow of the cleaning liquid provides for perfect hygienic cleaning of the leakage chamber.

Under standard conditions 15 valves 1,5" to 4" can be cleaned via one 1" spray distribution line. 10 valves can be cleaned via one 1” spray distribution line.

flow chambers

sealing surface

CIP

leakage

chamber

ring nozzle

Cleaning step seat lifting CIP spraying

Pre-flushing 3 x 10 sec.

Caustic flushing 80oC 3 x 5 sec. 3 x 10 sec.

Intermediate flushing 2 x 5 sec. 2 x 10 sec.

Acid flushing 3 x 5 sec. 3 x 10 sec.

Final flushing 2 x 5 sec. 2 x 10 sec.

Cleaning recommendation:

Double Seat Valve

DELTA DFplus2

Operating Manual: rev. 1

DELTA DFplus2 - UK1 / qxd.12.2004

Page 13

Seat lifting in the upper area

The upper valve shaft is lifted via the connection (B) at the seat lift actuator.

By lifting of the upper valve shaft, cleaning liquid flows over the upper seat seal into the leakage chamber and cleans this area.

The cleaning liquid is drained at the inner pipe of the lower valve shaft to the bottom.

Seat lifting in the lower area

The lower valve shaft is lifted via the connection (A) at the seat lift actuator.

By lifting of the lower valve shaft, cleaning liquid flows over the lower seat seal into the leakage chamber and cleans this area.

The cleaning liquid is drained at the inner pipe of the lower valve shaft to the bottom.

5. Cleaning

upper

valve shaft lifted

lower

valve shaft

closed

lower

valve shaft

lifted

leakage

chamber

- Cleaning liquid quantity per CIP spraying cycle:

1,5” - 6” about 5 - 10l/min

- Cleaning pressure at CIP cleaning connection:

min. 3 bar / max. 5 bar

* The seat lift cycles refer to a cleaning pressure of

p = 3 - 5 bar.

* The cleaning liquid quantity must be determined by the operator

who adjusts the opening stroke.

- Assembly and adjustment of the seat lift actuator see operating manual: seat lift actuator

double-seat valves D2 / DFplus2

* Depending on the pressure ratio, cleaning temperatures,

cleaning steps and degree of soiling, cleaning parameters must be changed to suit.

* with optimum use of the seat lift actuator.

upper

valve shaft

closed

Double Seat Valve DELTA DFplus2 Operating Manual: rev. 1

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- The valve must be installed in vertical position. Fluids are, therefore, freely drainable from the valve housing and from the leakage chamber.

- Valves can be welded direct into the pipelines (completely dismantable valve insert).

- Heights of installation and dismantling (see section 7).

Attention: Observe welding instructions.

6.1 Welding Instructions

- Before welding of the valve, dismantle the valve insert from the housing. Remove the housing cover (1) with seals. A careful handling to avoid damage to the parts is necessary.

- Welding should only be carried out by certified welders (EN 287-1) (seam quality EN 25817 "B").

- The welding of the valve housing must be undertaken in such a way that the valve body is not deformed.

- The preparation of the weld seam up to 3 mm thickness should be carried out as a sqare butt joint without air. (Consider shrinkage!)

- TIG orbital welding is best!

- After welding of the housing or of the mating flanges and after work at the pipelines, the corresponding parts of the installation or pipelines must be cleaned from welding residues and soiling. If these cleaning instructions are not observed, welding residues and dirt particles can settle in the valve and cause damage.

- Any damage resulting from the non-observance of these welding instructions is not subject to our guarantee.

6. Installation

Double Seat Valve

DELTA DFplus2

Operating Manual: rev. 1

DELTA DFplus2 - UK1 / qxd.12.2004

Page 15

7. Dimensions / Weights

inch A A1 B Di F H L L1 stroke stroke

upper lower

shaft shaft

1,5” 474 375 81 34,9 67 51,9 607 508 28 24

2” 481 382 87 47,6 72 64,6 633 534 28 24

2,5” 487 388 96 60,3 85 77,3 660 561 28 24

3” 493 394 100 72,9 100 88,9 683 584 28 24

4” 506 407 118 97,6 120 114,6 739 640 28 24

6” 608 794 136 146,9 150 170 914 803 42 38

X Y

Hub

H A

installing dimensions in mm

X Y Y1

1,5” 260 660 560

2” 270 690 590

2,5” 300 720 620

3” 310 760 660

4” 350 830 730

6” 450 1040 930

dimensions in mm

weights in kg

inch without with

seat lift actuator seat lift actuator

1,5” 8,4 11,1

2” 9,7 12,4

2,5” 14,5 17,2

3” 16,5 19,2

4” 24,7 28,2

6” 51,0 57,0

Double Seat Valve DELTA DFplus2 Operating Manual: rev. 1

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8. Technical Data

kvs - values for DELTA DFplus 2 valves in m3/h

1,5” 37 51 22 26

2” 64 84 44 50

2,5” 111 185 77 75

3” 154 240 106 105

4” 340 440 177 168

6” 800 1050 440 456

Max. line pressure : 5 bar

Max. operating temperature : 135°C EPDM, HNBR

*FPM, *VMQ

Short-term load : 140°C EPDM, HNBR

*FPM, *VMQ

* no steam

tightening torque of safety nut at upper valve shaft : 40Nm

CIP - connection : 1/2” clamp connection

throughput during cleaning : 3bar / 5 - 10 l/min

Air connection (for hose) : 1/4” OD

Max. pneumatic air pressure : 10 bar

Min. pneumatic air pressure : 6 bar

(Use dry and clean air only)

Double Seat Valve

DELTA DFplus2

Operating Manual: rev. 1

DELTA DFplus2 - UK1 / qxd.12.2004

Page 17

9. Materials

Housing, valve seat, shafts 1.4571, 1.4404

Actuator, yoke, guide rod, screws, operating cam 1.4301

Seals: standard: EPDM/ PTFE

optional: HNBR, FPM, VMQ

Air connections: PA 6.6

8. Technische Daten

Quantity of operating leakages of DFplus2 valves

3 bar line pressure in upper valve housing

fluid: water t = 20oC, figures in litre

inch valve open valve closed

1,5” 0,15l 0,35l

2” 0,2l 0,4l

2,5” 0,22l 0,55l

3” 0,24l 0,66l

4” 0,4l 1,3l

6” 0,9l 1,5l

Standard design: actuator and seat lift actuator

inch actuator air consumption seat lift actuator air consumption

actuator seat lift actuator

in NL / stroke in NL / stroke

1,5” D 100 - 22 2,3 100 0,8

2” D 100 - 22 2,3 100 0,8

2,5” D 125 - 22 3,5 100 0,8

3” D 150 - 22 5,0 100 0,8

4” D 180 - 22 7,0 125 1,2

6” D 255 - 22 20,0 180 2,2

Double Seat Valve DELTA DFplus2 Operating Manual: rev. 1

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10. Maintenance

- The maintenance intervals are different depending on the application and should be determined by the operator carrying out temporary checks.

- Replacement of seals, see service instructions. Use seal kits according to spare parts list.

- For the installation of the upper and lower seat seal assembly tools are respectively available (see 13).

- Assembly aid: Centering arbor: To install the valve insert in the

valve housing, use the centering arbor in 4" dimension (ref-No.: 51 - 13 - 725/93) in 6" dimension (ref-No.: 51 - 13 - 726/93).

Assembly arbor: The valve seat is positioned during

assembly with the valve yoke by the assembly arbor. (The assembly arbor canbe manufactured by the customer, see illustration).

- Required tools:

* plastic tip hammer * scribing iron (for seal removal) * 1 x wrench SW10 * 1 x wrench SW13 * 2 x wrench SW17

- Assembly of the valve, see service instructions.

- All seals must be provided with a thin layer of grease.

Recommendation:

APV food-grade grease for EPDM, HNBR and FPM

(0,75 kg /tin - ref.-No. 000 70-01-019/93) (60 g /tube - ref.-No. 000 70-01-018/93)

or APV food-grade grease for VMQ (Silicone)

(0,6 kg /tin - ref.-No. 000 70-01-017/93) (60 g /tube - ref.-No. 000 70-01-016/93)

Use only those greases being suited for the respective seal material.

! Do not use grease on mineral oil basis for EPDM seals. ! Do not use Silicone-based grease for Silicone seals.

20h9

polished

150

assembly arbor

Double Seat Valve

DELTA DFplus2

Operating Manual: rev. 1

centering arbor

DFplu2

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Page 19

11. Service Instructions

The item numbers refer to the spare parts drawings

inch: RN 01.053.80-1.

11.1 Dismantling from the line system

a. Disconnect pneumatic and electric connections.

b. Shut off line pressure in the product and cleaning lines.

c. Dismantle the cleaning line.

d. Release the clamp screw of the feedback support and unplug

the switch. (If a feedback is not installed, omit 11.1.d).

- Detach the control unit from the actuator / seat lift actuator.

(Turn the ring in anticlockwise direction.)

e. Remove the flange screws (22).

f. Screw one flange screw into the threaded bore of the valve yoke,

thus lifting the complete valve insert.

g. Carefully lift the valve insert out of the valve housing.

! Attention: Do not damage the valve seat

or the lower valve shaft.

- Finally remove the flange screw.

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11. Service Instructions

11.2 Dismantling of seals (service)

The item numbers refer to the spare parts drawings

inch: RN 01.053.80-1.

11.2.1 Dismantling of housing cover (1)

a. Remove the housing cover (1) from the housing.

b. Remove the housing seal (3), guide band (29), shaft seal (28)

and seat seal (27).

11.2.2 Dismantling of valve insert

a. Control the valve with a compressed air pressure of min. 4 bar.

Drive the valve into open position.

Attention: Risk of injury by sudden valve actuation.

Do not touch movable parts.

b. Screw off the safety nut (30). Hold up the lower valve shaft (4)

with a wrench SW17 to prevent it from turning.

c. Pull off the lower valve shaft (4).

Prick a pointed tool into the lower seat seal (5) and pull it out of the groove.

d. Release the clamp screw of the coupling (14) and remove the

complete coupling.

e. Cut off pneumatic air pressure.

f. Pull off the upper valve shaft (6).

Prick a pointed tool into the upper seat seal (7) and pull it out of the groove.

g. Attention: If the valve is equipped with a seat lift actuator,

the actuator must be dismantled, at first.

- Release the hex. screws and remove them. Valve without seat lift actuator:

- Remove the yellow cap from the actuator rod.

h. Press the guide rod out to the top.

Use a rubber mallet to facilitate the work.

i. Remove the operating cam (13). Remove the o-ring (19).

j. Remove the hex. screw (12). Remove the valve seat (10).

Dismount the upper shaft seal (23), seat seal (24) and the housing seals 3 x (3). Remove the guide bushes (20, 21) from the yoke.

housing

27, 28

lower

valve shaft

seat lift actuator

actuator

24, 23

20, 21

Double Seat Valve

DELTA DFplus2

Operating Manual: rev. 1

DELTA DFplus2 - UK1 / qxd.12.2004

Page 21

11.3 Installation of seals and assembly of valve

The item numbers refer to the spare parts drawings

inch: RN 01.053.80-1

11.3.1 Assembly of valve insert

a. Insert the guide bush (20) into the metal guide bush (21). Place

the guide bush (21) in the yoke (16) (see fig. 1).

b. Insert the slightly greased o-rings (19) into the operating cam (13).

c. Provide the upper shaft seal (23), seat seal (24) and housing

seals (3) with a thin grease layer. Install the upper shaft seal and seat seal in the valve seat (10). Insert the housing seals (3) via the valve seat into the grooves. Check the even fit of the seals (see fig. 2).

d. Press the valve seat (10) against the yoke (16) and fix the

assembly with the hex. screw (12). Position the valve seat with the assembly arbor (see fig. 3). Tighten the hex. screw (12).

e. Install the upper seat seal (7) in the upper valve shaft (6) according

to service instructions (see 13.).

f. Carefully knock the upper valve shaft (6) with a rubber mallet

through the guide bush. Place the operating cam (13). Press the upper valve shaft into the valve seat until it stops.

g. Push in the guide rod (8) with the threaded part ahead from the top

through the actuator (31) , through the operating cam (13) and through the yoke (16) unti it stops.

h. Attention:

To connect the upper shaft (6) with the actuator (24), compressed air of "min. 4 bar" is required for the next step.

i. Drive the valve into "open position" by pneumatic air supply.

j. Connect the two shaft ends with the coupling clamp (14).

- Attention:

During fastening the distance tube must be between the two coupling halves. The coupling screw must not slew into the feedback area.

11. Service Instructions

yoke 16

fig. 1

valve seats 10

fig. 2

valve seat

assembly arbor

yoke

fig. 3

Double Seat Valve DELTA DFplus2 Operating Manual: rev. 1

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11. Service Instructions

k. Insert the lower seat seal (5) into the lower valve shaft (4)

according to service instructions (see 13.).

l. Push the lower valve shaft (30) via the guide rod (8) against the

valve disk.

m. Tighten the safety nut (30) on the guide rod (8) until stop.

Tightening torque = 40 Nm.

* Cut off pneumatic air.

Danger: Do not touch movable parts!

Risk of injury by closing of the valve!

Attention: Only for valve dimension 4"and 6” is the

centering arbor required for the installation of the valve insert in the housing.

(centering arbor 4”: ref-No.: 51 - 13 - 725/93

centering arbor 6”: ref-No.: 51 - 13 - 726/93).

- Fasten the centering arbor with the inner hex. screw at the lower valve shaft (see fig. 4).

n. Press the yellow cap on the actuator rod.

- If the DFplus2 valve is equipped with a seat lift actuator,

mount the seat lift actuator. Fasten the seat lift actuator with the hex. screws on the actuator.

11.3.2 Assembly of housing cover

a. Slightly grease the lower shaft seal (28), seat seal (27), guide

band (29) and housing seal (3). Install the shaft seal (28) at first and then the seat seal (27) in the housing cover (1). Insert the guide band (29) and the housing seal (3). Check the even fit of the seals (see fig. 5).

b. Fasten the housing cover (1) with the hex. screws in the housing.

housing 4” - 6”

assembly aid

fig. 4

fig. 5

Double Seat Valve

DELTA DFplus2

Operating Manual: rev. 1

DELTA DFplus2 - UK1 / qxd.12.2004

Page 23

11. Service Instructions

11.3.3 Assembly of valve insert in the housing

a. Introduce the complete valve insert carefully in the valve

housing (1). The centering pin positions the yoke flange.

b. Tighten the hex. screws (22) crosswise.

c. Fasten the hex. screw (11) M8 x 6 mm in the open threaded bore

of the yoke flange.

d. Mount the pneumatic air and cleaning lines.

e. Installation of valve feedback

Fine adjustment:

Push in the feedback switches until stop.

Fine adjustment:

By slight displacing motion of the switch, the shift point can be adjusted if necessary. Observe the luminous diode at the switch during adjustment.

- Fix the switch with the clamp screws.

12. Actuator

Attention: Actuator is under spring force.

Do not open it.

(The item numbers refer tot the spare parts drawing RN 01.053.22.)

I. Replacement of o-rings

(Remove the valve yoke and the seat lift actuator (if necessary) from the actuator.) Disassembly as described in 11.1 and 11.2.

a. Dismantle the lower actuator o-ring (2).

b. Remove the hex. screws and lift off the cover (3).

(If the valve is equipped with a seat lift actuator, it can be omitted.)

c. Dismantle the upper actuator o-ring (2).

II. Assembly of actuator

a. On both sides of the actuator, slide a greased o-ring (2) via the

piston rod into the groove on the face.

b. Push the actuator cover (6) over the piston rod (air supply side)

and fasten it with the screws (5). (If the valve is equipped with a seat lift actuator, it can be omitted.)

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The assembly tool consists of:

- nut

- thrust ring

- ring with venting plug

- housing

- threaded bolt

Installation of seat seal in the valve shaft

1. Insert the valve shaft in the housing in such a manner that the

seal groove is in the valve housing.

2. Fix the shaft in the housing by means of the threaded bolt.

Clamp the housing into a vise.

3. Slightly grease the seat seal with APV food-grade grease.

Slide the seal onto the ring with venting plug until it stops.

4. Insert the ring with the seat seal into the housing and press it

down until it stops.

5. Insert the thrust ring into the housing. Screw on the nut and

tighten it by a hook spanner until it stops.

6. Release the nut. Take the ring and thrust ring out of the housing.

7. Unclamp the housing , release the threaded bolts. Take the valve

shaft out of the housing.

Check the even fit of the seat seal.

13. Assembly Tool

nut

thrust ring

ring

seat seal

upper

valve shaft

lower

valve shaft

housing

threaded bolt

Assembly tool for upper seat seal

inch ref.-No.:

1,5” 000 - 51 - 13 - 111/17

2” 000 - 51 - 13 - 112/17

2,5” 000 - 51 - 13 - 113/17

3” 000 - 51 - 13 - 121/17

4” 000 - 51 - 13 - 115/17

6” 000 - 51 - 13 - 117/17

Assembly tool for lower seat seal

inch ref.-No.:

1,5” 000 - 51 -13 - 135/17

2” 000 - 51 - 13 - 136/17

2,5” 000 - 51 - 13 - 137/17

3” 000 - 51 - 13 - 138/17

4” 000 - 51 - 13 - 140/17

Double Seat Valve

DELTA DFplus2

Operating Manual: rev. 1

DELTA DFplus2 - UK1 / qxd.12.2004

Page 25

14. Detection of Seal Damage

Failure Remedy

Val v e c l o s e d a n d p r e s su r e i n u p p er h o u s i n g

Leakage between housing and Replace housing seal (3), shaft seal (23), yoke flange seat seal (24).

Leakage at the upper valve shaft Replace shaft seal (23), seat seal (24) in the yoke area and guide bushes (20, 21).

Leakage from the leakage chamber of the Replace seat seal (7). lower valve shaft Check function of control of

seat lift actuator.

Leakage from the leakage bore Replace housing seals (3).

Val v e c l o s e d a n d p r e s su r e i n l o w er h o u s i n g

Leakage between housing and Replace housing seals (3). housing cover (1)

Leakage at the outside surface of the Replace shaft seal (28), seat seal (27) lower valve shaft and guide band (29).

Leakage from the leakage chamber of the Replace seat seal (5). lower valve shaft

Leakage from the leakage bore Replace housing seals (3).

Val v e o p e n

Leakage from the leakage chamber of the Replace seat seal (5). lower valve shaft

Leakage from the leakage bore Replace housing seals (3).

Ac t u a t o r

Air escapes from the actuator rod Replace O-ring (2) at the

actuator top.

Actuator does not work (air escapes Replace the complete actuator. permanently from the venting plug)

Val v e f e e d b a ck

Feedback is missing Carry out fine adjustment.

Double Seat Valve DELTA DFplus2 Operating Manual: rev. 1

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15. Spare Parts Lists

Double Seat Valve

DELTA DFplus2

Operating Manual: rev. 0

DELTA DFplus2 - UK1 / qxd.12.2004

( see annex )

The reference numbers of the spare parts for the different valve designs and sizes are included in the attached spare parts drawings with corresponding lists.

Please indicate the following data to place an order for spare parts:

- number of required parts

- reference number

- designation.

Data are subject to change.

Page 27

Page 28

Translation of original manual

BA D F p l u s2 0 0 2 ID-No.: H 2 0 7 6 1 7

Rev. 1

APV Zechenstraße 49 D-59425 Unna

Phone: +49(0) 23 03/ 108-0 Fax: +49(0) 23 03 / 108-210

For more information about our worldwide locations, approvals, certifications, and local representatives, please visit www.apv.com.

The information contained in this document, including any specifications and other product details, are subject to change without notice. While we have taken care to ensure the information is accurate at the time of going to press, we assume no responsibility for errors or omissions nor for any damages resulting from the use of the information contained herein.

Your local contact:

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