wt 2575.11 02-08 khe eng · 2016-05-16 · wt 2575/11 page 4 mode of operation the sealing system...

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wT 2575/11 Page 1 Mounting and treatment instructions for KLINGER Ballostar KHE ball valves Split body design, DN 15 – 200 and NPS ½“ – 8“ Edition: 06/2006 Rev.: 02/2008 Fluid Control GmbH Am Kanal 8-10 A-2352 Gumpoldskirchen / AUSTRIA Tel.: +43(0) 2252 / 600 0 Fax: +43(0) 2252 / 600 359 e-mail: [email protected] Homepage: www.klinger.kfc.at 7 20 21 13 17 18 19 14 5 6 4 1 15 22 2 16 3 8 12 11 9 10 1 Body 2 Flanged end piece 3 Operating stem 4 Ball 5 Sealing element 6 Sealing ring 7 Stopper 8 Loading ring 9 Stuffing box 10 Slip ring 11 Antistatic disc 12 Fem. support ring 13 Hand lever 14 Secondary graphite sealing 15 Hex screw 16 Hex nut 17 Stuffing box nut 18 Belleville washer 19 Washer 20 Hex screw 21 Washer 22 Supporting ring

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Page 1: wT 2575.11 02-08 KHE ENG · 2016-05-16 · wT 2575/11 Page 4 MODE OF OPERATION The sealing system of the bore consists of: -A pre-stressed elastic sealing element made of stainless

wT 2575/11 Page 1

Mounting and treatment instructions for

KLINGER

Ballostar KHE ball valves Split body design, DN 15 – 200 and NPS ½“ – 8“

Edition: 06/2006 Rev.: 02/2008

Fluid Control GmbH Am Kanal 8-10 A-2352 Gumpoldskirchen / AUSTRIA

Tel.: +43(0) 2252 / 600 0 Fax: +43(0) 2252 / 600 359 e-mail: [email protected] Homepage: www.klinger.kfc.at

7 20 21 13

17 18 19 14 5

6 4 1 15 22 2 16

3 8

12 11 9

10

1 Body 2 Flanged end piece 3 Operating stem 4 Ball 5 Sealing element 6 Sealing ring 7 Stopper 8 Loading ring 9 Stuffing box 10 Slip ring 11 Antistatic disc 12 Fem. support ring 13 Hand lever 14 Secondary graphite sealing 15 Hex screw 16 Hex nut 17 Stuffing box nut 18 Belleville washer 19 Washer 20 Hex screw 21 Washer 22 Supporting ring

Page 2: wT 2575.11 02-08 KHE ENG · 2016-05-16 · wT 2575/11 Page 4 MODE OF OPERATION The sealing system of the bore consists of: -A pre-stressed elastic sealing element made of stainless

wT 2575/11 Page 2

Table of contents Page 3 Functional principle Page 4, 5, 6 Mode of operation

Page 7, 8 Instructions for treatment, tightening torques and wrench sizes

Page 8 Material code Page 9 Designation of parts and materials

Page 10 Type overview

Page 11 Type overview sealing elements Page 12 Type overview stuffing boxes

Page 13 Components of labyrinth stuffing box Page 14, 15 Dismantling & assembling of valve

Page 16 Installation of valve, mounting of actuator Page 17, 18 Operating torques Page 19 Initiating operation and safety instructions

Page 3: wT 2575.11 02-08 KHE ENG · 2016-05-16 · wT 2575/11 Page 4 MODE OF OPERATION The sealing system of the bore consists of: -A pre-stressed elastic sealing element made of stainless

wT 2575/11 Page 3

FUNCTIONAL PRINCIPLE Because of the ELASTIC SEALING SYSTEM, the KLINGER Ballostar® KHE ball valve is absolutely leak tight at high, but also at extremely low pressures. The required contact forces between sealing ring and ball are created by the differential pressure in the ball valve. For the FLOATING BALL sealing principle it is important that the shut-off device is freely moveable. The sealing rings perform two functions at the same time: They guide the ball and absorb bearing forces.

FORCE FLOW The forces which are absorbed by the sealing rings increase with larger nominal diameters (DN, NPS). Therefore the floating ball design is only used for small sized ball valves. To achieve a high service life and to reduce the operating torques for pivot movements, the floating ball design is only used for sizes up to DN 125. For larger sizes lower costs in production face the significant higher costs for increasing the moment of force to surmount the high operating torques. The increased amount of friction caused by high loading pressures additionally leads to a low service life and a poor number of shifting cycles.

Page 4: wT 2575.11 02-08 KHE ENG · 2016-05-16 · wT 2575/11 Page 4 MODE OF OPERATION The sealing system of the bore consists of: -A pre-stressed elastic sealing element made of stainless

wT 2575/11 Page 4

MODE OF OPERATION The sealing system of the bore consists of:

- A pre-stressed elastic sealing element made of stainless and acid resistant steel with a KFC-sealing ring (Standard) and a U-Sleeve made of K-Flon located at the pitch of the body and the flange end piece.

- An inelastic sealing ring located in a chambered groove in the body - The ball between sealing element and sealing ring

Basically KLINGER Ballostar® KHE ball valves can be pressurized in both directions. In consequence of the different design of the two sealing components two operating conditions depending on the mounting direction are possible: 1.) The elastic sealing element respective the flange end piece is mounted upstream: The fluid pressure presses the ball against the downstream located sealing ring. At the same time, the upstream located sealing element is pressed against the ball. Because of the elasticity of the KLINGER sealing system two sealing areas are permanently available in the bore. For standard applications KLINGER recommends this situation of installation as preferred mounting direction. This recommended direction is additionally marked with an arrow on the valve body.

Occurring forces: F1…Fluid force acting on ball

F2…Fluid force acting on

sealing element

Fv…Spring force of sealing

element

F1+F2+Fv…Total force, which

acts onto the sealing ring

Page 5: wT 2575.11 02-08 KHE ENG · 2016-05-16 · wT 2575/11 Page 4 MODE OF OPERATION The sealing system of the bore consists of: -A pre-stressed elastic sealing element made of stainless

wT 2575/11 Page 5

2.) Inelastic sealing ring respective body flange is mounted upstream: The fluid pressure acts against the preloading force of the elastic sealing element located downstream. If the force of the fluid pressure is higher than the preloading force, the ball lifts from the sealing ring and only the downstream located sealing element performs the primary sealing function. Due to the fact that this condition occurs at high differential pressures the surface pressure between sealing element and ball is high enough to enable an effective sealing. At high differential pressures the preloading force of the elastic sealing element is high enough to press the ball against the upstream located sealing ring. A second primary sealing area is created, which enables an outstanding effective sealing!

High differential pressures: FV-F1 < F1 …ball lifts from upstream located sealing ring Low differential pressures: FV-F1 > F1 …upstream located sealing ring is in full function KLINGER Ballostar® KHE ball valves are basically maintenance free and can be pressurized in both flow directions. The U-sleeve which is drawn onto the supporting ring is completely chambered and seals the pitch flange against the outside. Additionally ball valves of type KHE have secondary graphite sealing between body and flange end piece.

Occurring forces: F1…Fluid force acting on ball

Fv…Spring force of sealing

element

Fv-F1…Total force, which acts

onto the sealing ring and

against fluid pressure

Page 6: wT 2575.11 02-08 KHE ENG · 2016-05-16 · wT 2575/11 Page 4 MODE OF OPERATION The sealing system of the bore consists of: -A pre-stressed elastic sealing element made of stainless

wT 2575/11 Page 6

THE EXTERNAL SEALING SYSTEM The sealing of the shifting shaft (operating stem) is carried out by a belleville washer supported stuffing box. This type of sealing is almost maintenance free and has just little set-off behaviour. Only small tightening forces are required for leak tightness. The arrangement of the belleville washer ensures that a constant contact pressure acts against the stuffing box to compensate alternating temperature- and pressure changes.

WELT OF SEALING RING The grove in the body prevents floating of the sealing ring in radial direction (1) against the back side (2) and the bore (3). The ball presses against the sealing ring (4). Therefore the sealing ring can not set down or flow, because it is surrounded on each side.

Page 7: wT 2575.11 02-08 KHE ENG · 2016-05-16 · wT 2575/11 Page 4 MODE OF OPERATION The sealing system of the bore consists of: -A pre-stressed elastic sealing element made of stainless

wT 2575/11 Page 7

INSTRUCTIONS FOR TREATMENT KLINGER Ballostar ball valves are delivered in OPEN position. To protect them against dirt contamination and damage the flange ends are covered with plastic caps. We recommend removing the caps not until you want to install the valve. KLINGER valves should be stored in closed rooms with non-aggressive ambient atmosphere and where they are protected from moisture and dirt. Furthermore the maximum temperatures and pressures, specified in the P/T-diagrams, should not be exceeded during operation. Just under these specified conditions mentioned before our warranty for the determined duration is valid. Please notice, this warranty does not include valve components that are subjected to corrosion, erosion and wear during operation If cover- or shrink foils are used, you have to have to make sure, that the atmosphere within the foil is free of condensation. For storage in dusty rooms appropriate protective measures are recommended. To avoid confusion we suggest to name and store parts according to their shipping documents. The temperature in the storage areas should range between -20° C and +50° C. Fast changes of temperature should be avoided (creation of condensation- and perspiration water). Instructions for treatment and application are part of the shipment and should therefore be stored next to the goods. This makes sure that all necessary information and documentation are passed on. Changes in documentation which belong to the storage of KLINGER products are timely forwarded by circular letters. Damages which can result from inappropriate storage absolve KLINGER from obligations deriving from guarantee, warranty and product liability.

Page 8: wT 2575.11 02-08 KHE ENG · 2016-05-16 · wT 2575/11 Page 4 MODE OF OPERATION The sealing system of the bore consists of: -A pre-stressed elastic sealing element made of stainless

wT 2575/11 Page 8

KLINGER ball valves are basically MAINTENANCE FREE! During long periods of non-operating, the valves have to be drained. In case of leakage the screws of the body have to be retightened. Please check table No.1 for the required torque values! KLINGER recommends operating the valve minimum six times a year to increase the service life!

Table 1: Tightening torques and wrench sizes (SW) Tolerances for tightening torques of stuffing box nut: + 10 % Tolerances for tightening torques of body screws: ± 10 % Screw thread lubricated with special grease paste: MOLYKOTE 1000

Material codes of KLINGER Ballostar KHE ball valves

The material codes (m.c.) characterise the materials of body and flange end piece. Used Materials: DIN ANSI Carbon steel: GS – C25N 1.0619 WCB Stainless steel: G-X 6Cr NiMo 1810 1.4408 CF8M 1) Approval in cryogenic temperature range acc. to pressure-/temperature-diagram wT 2455/2 (13.05.96) (Application limits acc. to AD-Merkblatt W 10 – technical sheet for the acceptance of facilities)

Size DN

NPS

15 ½”

20 ¾”

25 1”

32

40

1 ½”

50 2”

65

2 ½”

80 3”

100 4”

125

-

150 6”

200 8”

Tightening torque of stuffing box nut 5 15 15 25 25 20 20 40 40 40 o.r. o.r.

Tightening torque of body screws 9 20 20 40 60 60 80 110 120 o.r. o.r.

SW of stopper screws 8 10 10 13 13 13 13 19 19 19 o.r. o.r.

SW of body screws 10 13 13 17 19 22 19 24 24 24 o.r. o.r.

SW of stuffing box nut: DIN-version ANSI-version

16 5/8”

22 7/8”

22 7/8

24

15/16”

24

15/16”

36

1 7/16”

36

1 7/16”

46

1 13/16”

46

1 13/16”

50 -

50 2”

65

2 9/16” SW of operating stem 8 11 11 14 14 17 17 22 22 27 27 36

o.r. = on request

Symbol Body/end piece Internal parts Colour/surface treatment VIII Carbon steel Without copper alloy black - phosphated Xc Stainless steel Stainless steel blanc - pickled

Page 9: wT 2575.11 02-08 KHE ENG · 2016-05-16 · wT 2575/11 Page 4 MODE OF OPERATION The sealing system of the bore consists of: -A pre-stressed elastic sealing element made of stainless

wT 2575/11 Page 9

DESIGNATION OF PARTS AND MATERIALS

Materials Pos. Parts of the standard version m.c. VIII m.c. Xc1 Body 1.0619 (WCB) * 1.4408 (CF8M) ** 2 Flange end piece 1.0619 (WCB) * 1.4408 (CF8M) ** 3 Operating stem 1.4104 1.4571 4 Ball 1.4401(316)**** 5 Sealing element *** Xc - KFC 6 Sealing ring *** KFC 7 Stopper 1.4301 8 Fem. support ring 1.4404 9 Labyrinth stuffing box* K – Flon / 4401 / Graphite 10 Slip ring KFC-25 11 Antistatic disc 1.4401 12 Loading ring 1.4404 plasma-nitrated 13 Hand lever 1.4006/Vinyl blue 14 Hexagon screw 8.8-A2L A4-70 15 Hexagon nut 8-A2L A4 16 Stuffing box nut 1.4404 17 Belleville washer 1.4310 18 Washer A4 19 Hexagon screw A4-70 20 Supporting ring Sint D10/Sint C39 1.4404 (316L) 21 Secondary body sealing Graphite 22 Socket head screw A4-70 23 Hexagon nut A4

19 18 7 16 12 17 8

11 9

13

22

23

14 1 10 3 6 4 20 5 21 15 2

* Zn/Fe phosphated ** pickled *** Standard design **** beginning with DN65: 1.4408 (CF8M)

Page 10: wT 2575.11 02-08 KHE ENG · 2016-05-16 · wT 2575/11 Page 4 MODE OF OPERATION The sealing system of the bore consists of: -A pre-stressed elastic sealing element made of stainless

wT 2575/11 Page 10

TYPE OVERVIEW

There are three different types of KHE ball valves available: KHE-FK, KHE-FL and KHE-CL The valves are differed by: - Overall length (EN 558-1 or ANSI 16.10 and basic series) - Type of flange connection: a) KHE-FK and KHE-FL ball valves are delivered with flanges

acc. to EN 1092-1 b) KHE-CL ball valves are equipped with flanges acc. to ANSI B 16.5

- Pressure range (PN16, PN40 or Class 150, Class 300) KHE-FL, long overall length acc. to EN 558-1, basic series 1 (DIN 3202-1F1)

KHE-FK, short overall length acc. to EN 558-1, basic series 27 (DIN 3202-1F4)

KHE-CL, short pattern acc. to ANSI B 16.10

Further information, as product features, dimensions, equipment and fields of application can be gathered from the product catalogue.

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wT 2575/11 Page 11

TYPE OVERVIEW SEALING ELEMENTS

Due to the modular system of construction the sealing system of KHE ball valves can be adapted easily for special applications. The sealing elements of the valves are suited for many kinds of applications, operating conditions and fluids. There are 4 types of different sealing elements/rings combinations available: 1. KFC-25 (Standard = Fire Safe) U-sleeve (K-Flon) Used for standard applications and as spare part

Elastic sealing element (stainless steel)

Sealing ring (KFC-25) 2. PTFE U-sleeve (K-Flon) Gas and vacuum applications

Elastic sealing element (stainless steel)

Sealing ring (PTFE) 3. Metal U-sleeve (K-Flon) Used for abrasive fluids Graphite Elastic sealing element

(stainless steel) Graphite gasket

Stelite plated Sealing ring 4. Single-Part Sealing Element Used for applications with high temperature changes

Sealing ring (KFC-25

Single part sealing element

U-Sleeve (K-Flon)

U-Sleeve (K-Flon)

4.1 Single Part Sealing Element with release hole used for heavy expanding liquids and high temperature changes

Single part sealing element

Sealing ring (KFC-25)

release- hole

Page 12: wT 2575.11 02-08 KHE ENG · 2016-05-16 · wT 2575/11 Page 4 MODE OF OPERATION The sealing system of the bore consists of: -A pre-stressed elastic sealing element made of stainless

wT 2575/11 Page 12

TYPE OVERVIEW STUFFING BOXES

Labyrinth stuffing box (PTFE)

Graphite stuffing box

O-ring Stuffing box (Viton)

Fields of application: Vacuum and gases

Fields of application: High temperature

Fields of application: This is the standard type of stuffing box.

Page 13: wT 2575.11 02-08 KHE ENG · 2016-05-16 · wT 2575/11 Page 4 MODE OF OPERATION The sealing system of the bore consists of: -A pre-stressed elastic sealing element made of stainless

wT 2575/11 Page 13

COMPONENTS OF LABYRINTH STUFFING BOX

Nominal Diameter

Pos.1 Pos.2 Pos.3 Pos.4 Pos.5 Pos.6

15 10/14x0,5 10 (10/14x0,4) 10,1/14x0,5 10,5x14,2 x0,1 10/14x2 10/14x1,5 20, 25 16/21x0,7 16 (16/21x0,5) 16/21x0,5 16,5/21,2x0,1 16/21x2 16/21x1 32, 40 20/26x1,0 20 (20/26x0,5) 20/26x0,7 20,5/26,2x0,1 20/26x2 20/26x2 50, 65 25/33x1,0 25 (25/33x1,0) 25/33x0,7 25,5/33,2x0,1 25/33x2 25/33x1

80, 100 30/40x1,5 30 (30/40x1,0) 30,1/40x1,0 30,5/40,3x0,1 30/40x2 30/40x2 125 34/34x1,5 34 (34/45x1,0) 34/45x1,0 34,5/45,3x0,1 34/45x2 34/45x2

Nominal Diameter 15 20,25 32,40 50,65 80,100 125 Quantity of Pos.1 3 4 4 4 4 6 Quantity of Pos.2 3 4 4 4 4 6 Quantity of Pos.3 1 1 1 1 1 1 Quantity of Pos.4 1 1 1 1 1 1 Quantity of Pos.5 1 2 2 3 3 5 Quantity of Pos.6 1 1 1 1 1 1

Pos. 1 Stuffing box lamella K-Flon Pos. 2 Disc 1.4401 Pos. 3 Slip ring KFC-25 Pos. 4 Antistatic disc 1.4401 Pos. 5 Washer Graphite Pos. 6 Washer Graphite

6 2 5 3

4 1

Page 14: wT 2575.11 02-08 KHE ENG · 2016-05-16 · wT 2575/11 Page 4 MODE OF OPERATION The sealing system of the bore consists of: -A pre-stressed elastic sealing element made of stainless

wT 2575/11 Page 14

ASSEMBLING AND DISMANTLING

a) Remove valve from line

b) Turn hand lever in „OPEN“-position

c) Loosen hexagon screw

d) Remove hand lever and stop

e) Loosen hexagon screw

f) Take off flange end piece

g) Secure ball against twisting and loosen stuffing box nut

h) Turn to “CLOSED”- Position

Re-assembling: Do NOT insert supporting rings

It is not necessary, if a single- piece sealing element is used.

i) Remove graphite sealing, sealing element, supporting ring and ball

2

1

3

2

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wT 2575/11 Page 15

j) Remove stuffing box nut

Clamp on these surfaces. Warning: Use protectors

Stuffing box nut secured with LOCTITE 620

Loading ring

Belleville washer

Fem. supporting ring Antistatic disc

Labyrinth stuffing box

4

3

k) Carefully remove operating stem and slip ring from the body

5

6

Assembly is done in reversed sequence (6-5-4-3-2-1) Please Remember: Screw bolts have to be tightened crosswise! Check the table 1 (page 7) to get the correct torque values and wrench sizes.

Page 16: wT 2575.11 02-08 KHE ENG · 2016-05-16 · wT 2575/11 Page 4 MODE OF OPERATION The sealing system of the bore consists of: -A pre-stressed elastic sealing element made of stainless

wT 2575/11 Page 16

INSTALLATION OF VALVE Although KHE ball valves can be pressurised in both flow directions, KLINGER recommends a preferred mounting direction. The correct mounting direction is marked with an arrow on the valve body. This ensures that the flange end piece (respective the elastic sealing element) of the ball valve is positioned upstream. ATTENTION: Make sure, that you use the metal part of the hand lever and not the plastic cover to bear or lift the valve.

MOUNTING OF ACTUATOR Preparation: Type and Dimension of the actuator is determined by the required torque for operating the ball valve. The torque values of valve and actuator can be taken from the torque tables. Attention should be paid to the operating conditions.

A type plate is not standard Direct mounting of actuators (as shown on the picture above) is only recommended for temperatures beneath 80°C. KLINGER recommends to use mounting kits with bracket and coupling, if the connection-holes of actuator and valve do not match or high operating temperatures occur. Installation: • Turn both valve and actuator into “OPEN”-position. • Install actuator in the correct position (ATTENTION: valve closes with counter clock wise rotation).

Make sure, that the 90° rotation precisely complies with the end positions “OPEN” respective “CLOSE”.

• Perform an operational test

Take notice of the actuator position! (Remember: the actuator has to be in “OPEN”-position during the assembly)

Mounting situation acc. to ISO 5211, DIN 3337 (except DN 10 and 1S)

Page 17: wT 2575.11 02-08 KHE ENG · 2016-05-16 · wT 2575/11 Page 4 MODE OF OPERATION The sealing system of the bore consists of: -A pre-stressed elastic sealing element made of stainless

wT 2575/11 Page 17

OPERATING TORQUES

Operating torques [Nm], sealing element KFC-25 Differential pressure [bar]

NPS DN 0 5 10 16 Class 150 25 30 40

Class 300

1/2" 15 6 6,2 6,4 6,6 6,8 7 7,2 7,6 8 3/4" 20 12 12,4 12,7 13,1 13,4 13,8 14,1 14,8 15,5 1" 25 14 15 16,1 17,3 18,1 19,2 20,2 22,3 24,3

1 1/4" 32 17 18,4 19,9 21,6 22,7 24,1 25,6 28,4 31,3 1 1/2" 40 25 27,8 30,6 33,9 36,1 38,9 41,7 47,2 52,8

2" 50 37 40,6 44,3 48,6 51,5 55,1 58,8 66 80 2 1/2" 65 60 66,3 72,5 80 85 91,3 97,5 110 200

3" 80 96 114 132 153,6 168 186 204 240 300 4" 100 160 183,8 207,5 236 255,0 278,8 302,5 350 420

Size

5" 125 270 317,5 365 422 460 507,5 555 650 720

Orpeational torques [Nm], sealing element PTFE

Differential pressure [bar]

NPS DN 0 5 10 16 Class 150 25 30 40

Class 300

1/2" 15 5,4 5,6 5,8 6 6,1 6,3 6,5 6,8 7,2 3/4" 20 10,8 11,1 11,4 11,8 12,1 12,4 12,7 13,3 14 1" 25 12,6 13,5 14,5 15,6 16,3 17,2 18,2 20 21,9

1 1/4" 32 15,3 16,6 17,9 19,4 20,4 21,7 23 25,6 28,2 1 1/2" 40 21,3 23,6 26 28,8 30,7 33,1 35,4 40,1 44,9

2" 50 30,3 33,3 36,3 39,9 42,2 45,2 48,2 54,1 75 2 1/2" 65 51 56,3 61,6 68 72,3 77,6 82,9 93,5 180

3" 80 72 85,5 99 115,2 126 139,5 153 180 250 4" 100 120 137,8 155,6 177 191,3 209,1 226,9 262,5 350

Size

5" 125 202,5 238,1 273,8 316,5 345 380,6 416,3 487,5 600

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wT 2575/11 Page 18

Operating torque [Nm], sealing element metal

Differential pressure [bar]

NPS DN 0 5 10 16 Class 150 25 30 40

Class 300

1/2" 15 7,5 7,8 8,2 8,5 8,8 9,1 9,5 10,1 10,8 3/4" 20 15 15,7 16,4 17,2 17,8 18,5 19,2 20,6 22 1" 25 18 19,4 20,9 22,6 23,7 25,1 26,6 29,4 32,3

1 1/4" 32 25 26,7 28,3 30,3 31,7 33,3 35 38,3 41,7 1 1/2" 40 40 44,8 49,5 55,2 59 63,8 68,6 78,1 87,6

2" 50 55 64,4 73,8 85 92,5 101,9 111,3 130 180 2 1/2" 65 85 101,9 118,8 139 152,5 169,4 186,3 220 300

3" 80 140 172,5 205 244 270 302,5 335 400 500 4" 100 250 293,8 337,5 390 425 468,8 512,5 600 750

Size

s

5" 125 450 580 710 866 970 1100

KLINGER recommends to use a safety-factor of 1,5 (= +5O%) for calculation .

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wT 2575/11 Page 19

INITIATING OPERATION After installation and before initiating operation make sure to: • Remove solid parts from the pipeline, which are not components of the fluid. • Perform a functional test • Perform a pressure test Please notice that damages, which are caused by impurities or solid parts in the fluid/medium, are excluded from warranty!

SAFETY INSTRUCTIONS

In general the usage and operation of these valves is without any risks. But remember yourself to act with caution and care: ● Make sure, that you choose the correct type of ball valve which meets the requirements of your application and operating conditions. Take care of the safety instructions and pressure/temperature limits. Use the product catalogue to select the best suitable material for your field of application • Before installing and dismounting the valve the line is drained and not pressurized. • Do not loose any screws on parts which are under pressure, unless this task is specified in the

mounting and treatment instructions. • The assembling and service tasks should be performed only by qualified people. • Make sure that all connections are duly tightened, after the dismantling process. • Do not open any screws, bolts or nuts by force.

• ATTENTION when opening drain cocks – DANGER fluid is released. • ATTENTION – take care of moving/movable parts! Especially if ball valves are equipped with

electric or pneumatic actuator. This mounting and treatment instructions have to be referred to those employees who are operating or maintaining these types of ball valves!