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IOM FOR BALL VALVES

Date: 2018.09.10   Views: 566

INSTRUCTION OPERATION MANUAL FOR FLOATING SPLIT BODY BALL VALVES

1. Forewords

1.1.  The valves described in this manual have been designed to block the flow for ON/OFF service only. Do not use the valve for flow control neither in partly open nor for throttling service to avoid damage on the sealing surfaces.

As a type of pressure equipment, valve has potential hazards of pressure and creation of explosive atmosphere resulting from leakage of process fluid. For the safety purpose, user shall read this instruction to know what TSV has already taken into account in our design and manufacture, and what action shall be taken by user according to essential health and safety requirements.

2. Essential health & safety requirements and solution

2.1 What’s TSV design idea

- Ball valve is designed to API 608, valve has adequate strength according to ASME B16.34  pressure temperature rating.

- Valve is designed with fire-safety structure certified in accordance with API 607.

- Valve contains no light metal (such as Mg) and all parts are electricity conductive and connected to prevent ignite resource.

- Valve is designed with hand wheel, or gear operator or electric actuator according to its size and torque, and operation requirements.

2.2 What action user shall take

2.2.1General 2.2.1.1In any occurrence, first ensure personnel safety.

2.2.1.2 Use the valves in accordance with ASME B16.34 pressure-temperature rating.

2.2.1.3 Make sure that the selected valve materials are corrosion/wear resistance to the service fluid.

2.2.1.4 Where the service fluid is flammable/explosive, to limit the working temperature.

2.2.1.5 When performing Repair/maintenance operations, make sure that the valves are always depressurized, vented and drained.

2.2.1.6 For actuator operated valves, make sure all supply lines (Electrical, hydraulic, Air) are disconnected before starting any operation.

2.2.1.7 When performing Repair/maintenance operations, always use appropriate protection e.g. protective clothing, (oxygen) masks, gloves, etc.

2.2.1.8 When performing Repair/maintenance operations, do not smoke, do not use any portable no-Ex-proof electrical device in the area and do not use open fire without a valid work permit.

 2.2.1.9 Valve must periodically checked on:

- Tightness of bolted connection (body/closure, gland, flange connection).

- Corrosion/wear damages (crack, pitting, thickness of the valve).

- Make sure the valves are in fully open/fully closed position.

2.2.2Specifics

Risk

Preventive Action

Accidental contact with dangerous service

fluid*

Due to: Gasket or Stem Blow out

1. See2.2.1General

2. Immediately replace Gasket and packing after a Blow-out (use approved/suitable materials only)

3. Use recommended torque as in Table 1

Accidental contact with dangerous service

fluid* during disassembly or maintenance

operations

1. See2.2.1General

2. After removal from the production line, open and close valve to guarantee depressurized cavity

3. Drain any remainder fluid or substances with suitable devices before disassembly

Structural yielding of valves body with

consequent risk of contact with dangerous

service medium*, explosion or fire

1. See2.2.1General

2. Create precautions to avoid additional forces on the valves

3. Avoid absolutely water hammer: install precaution devices if necessary (e.g. brakes, anti shock devices, etc.)

4. Avoid submitting excessive vibrations to the valves

5. Avoid quick Pressure and/or Temperature deviations

Accidental contact with High or Low

temperature parts

1. See2.2.1General

2. Predispose apposite insulation on the valve

3. Alert by means of warning signs about risk of burns

4. For Cryogenic service use only valves equipped with Cryogenic Extension

Fire or explosion in case of service with

flammable fluids

1. See2.2.1General

2. Install only Ex-proof electrical devices in the area

3. While performing maintenance in the area, shut down all electrical devices

Explosion in case of oxygen service

1. See2.2.1General

2. Install only Ex-proof electrical devices in the area

3. Install and use only valves completely degreased

4. Use valves only made with materials suitable for oxygen service

* Dangerous service fluid as there are: Toxic-, Corrosive-, Flammable-, High- or Low temperature etc. fluid


3. Application Scope and Technical Parameters

3.1 Application scope 

The series valves are widely used in petroleum, chemical, and allied industries for normal    operation of pipeline system

3.2 Technical Parameters:

Nominal pipeline size: 3/4”~6"

Nominal pressure: 150~800LB

Temperature range: ≤150℃

Fluid: Water, oil, and other kinds of fluid

Body material: Material as specified in ASME B16.34

Valve testing: API 598

Actuator: Gear, Lever


4.  Valve Structure

Please refer to Fig 1 and Fig 2 for valve structure.  

       


4.1 Main Parts and Material

Fig 1

Fig 2

NO.

Parts name

NO.

Parts name

1

Body

1

Body

2

Closure

2

Closure

3

Ball

3

Ball

4

Yoke

4

Gland flange

5

Gland flange

5

Level

6

Seat ring

6

Seat ring

7

Stem

7

Stem

8

Gland

8

Gland

9

Gasket

9

Gasket

10

Packing set

10

Steel ball

11

Packing

11

Packing set

12

Packing

12

Packing

13

Packing

13

Packing

14

Thrust plate

14

Packing

15

Gear actuator

15

Stop plate

16

Stud

16

Thrust plate

17

Nut

17

Stud

18

Bolt

18

Nut

19

Bolt

19

Bolt

20

Stud

20

Spring

21

Spring

21

Bolt

22

Steel ball

22

Retainer

23

Rivet

23

Washer

24

Nameplate

24

Rivet

25

Nut

25

Nameplate

26

Butterfly spring



27

Key

 


28

Pin



Table 5:Body material suitable for fluid and temperature range

 

ASTM A216-WCB

ASTM A352-LCB

ASTM A352-LCC

ASTM A217-WC6

ASTM A217-WC9

ASTM A351-CF8

ASTM A351 CF8M

ASTM A351-CF3

ASTM A351 – CF3M

RECOMMENDED TEMPERATURE LIMITS

-29~427 (T2-T6)

EN13463-

2001 (E)

-46~343 (T2~T6) EN13463-

2001 (E)

-46~343 (T2~T6) EN13463-

2001 (E)

-29~593 (T1~T6) EN13463-

2001 (E)

-29~593 (T1~T6) EN13463-

2001 (E)

-29~537 (T1~T6) EN13463-

2001 (E)

-29~593 (T1~T6) EN13463-

2001 (E)

-29~427 (T2~T6) EN13463-

2001 (E)

-29~454 (T1~T6) EN13463-2001 (E)

APPLICATION

STEAM, WATER, OIL, VAPOR, GAS and GENERAL SERVICE

LOW TEMPERATURE SERVICE STEAM, WATER, OIL, VAPOUR, GAS

HIGH TEMPERATURE SERVICE STEAM, WATER, OIL VAPOUR, GAS

HIGH and LOW TEMPERATURE SERVICE CORROSION RESISTANCE

Note: where the process fluid is flammable/explosive, it must limit the working temperature of the pipeline system.


Table 6:Valve main parts and material for 150~800LB

Part name

Materials (ASTM)

Body

A216-WCB

A216-LCB

A216-LCC

A216-WC6

A216-WC9

A351-CF8

A351-CF8M

A351-CF3

A351CF3M

Closure

A216-WCB

A216-LCB

A216-LCC

A216-WC6

A216-WC9

A351-CF8

A351-CF8M

A351-CF3

A351CF3M

Ball

A105, F304, F316, A276 410 etc.

Yoke

AISI 20-ZN

Gland flange

A216-WCB

A216-LCB

A216-LCC

A216-WC6

A216-WC9

A351-CF8

Level

1Cr18Ni9Ti (DN≤1”) or AISI 45

Seat ring

PTFE, PEEK, NYLON 1010

Stem

A105, F304, F316, A276 410 etc.

Gland

A276 420

1Cr18Ni9Ti

Gasket

Graphite or stainless steel winding gasket

Packing

Graphite

Packing

PTFE

Packing

PTFE

Packing

PTFE

Stop plate

AISI 45-NI

Thrust plate

PTFE

Steel plate

1Cr18Ni9Ti

Spring

1Cr18Ni9Ti

Stud

A193-B7

A320-L7 / A320-L7M

A193-B16

A193-B8 / A193-B8M

Nut

A194-2H

A194-4 / A194-7M

A194-4

A194-8 / A194-8M

Bolt

A193-B7

A320-L7 /A320-L7M

A193-B16

A193-B8 / A193-B8M

Butterfly spring

50CrVA

Retainer

Carbon Steel

1Cr18Ni9Ti

Washer

Carbon Steel

1Cr18Ni9Ti

Key

Carbon Steel

1Cr18Ni9Ti

Pin

Carbon Steel

1Cr18Ni9Ti

Rivet

Carbon Steel

1Cr18Ni9Ti

Nameplate

Stainless steel


4.2 Working Principle

The function of the ball valve is to cut off or put through the pipeline. When the ball drove by the wrench or other actuator, it rotates and the bore of ball superposition/perpendicular with the bore of body, the valve opens/closes.

4.3 Structure Description

4.3.1 This series uses packing seal structure. PTFE or NYLON is used as the seat ring material, PTFE or GRAPHITE is used as the stem packing material.        

4.3.2 In the event of fire, when all the soft seals are damaged, ball valve have post-fire metal-to metal contact of all sealing areas such as:

Contact between ball and body;

Contact between stem and body;

Contact between coupling flanges of split body.

4.3.3 This series uses packing seal structure. PTFE or NYLON is used as the seat ring material, PTFE or GRAPHITE is used as the stem packing material. 

4.3.4 Double “D” stem head design provides mounting of the lever handle always in parallel to the flow passage. Misalignment of the handle is thus presented.

4.3.5 The lower end of the stem is designed with an integral collar to be blowout-proof.


For more information, please contact:

ZHEJIANG TIANSHENG VALVE CO., LTD.

Linyang Industrial Zone,Wenzhou City,ZhejiangProvince. P. R. China

Tel: +86-577-67379608

E-mail:tsv@tsv.cn


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