OSE NACE Instruction Manual

Instruction Manual NTAOSENACE0603

Type OSE NACE

March 2006

SLAM-SHUT VALVE

D54

Figure 1. Type OSE NACE

Introduction The Type OSE NACE function is to protect transmission and distribution networks or pipe lines supplying industries and commercial businesses.

It permits the gas ow to be cut off rapidly and totally in the case of under or over regulator pressure.

The Type OSE NACE DN 250 (10-inch) completes the range covered by the Type OSE (DN 25 to 150 (1 to 6-inch)).

Revision 1

The Type OSE NACE is in conformity with the NACE standard MR0175 - 2001.

www.emersonprocess.com/regulators

Type OSE NACE Characteristics OPERATING PRESSURE 40 bar max

ACCORDING TO PN (SEE TABLE 2) (BMS ASSOCIATED, ACCORDING TO SIZE)

PS

OPERATING TEMPERATURE

TS

MAX DIFFERENTIAL (VALVE CLOSED)

P max

40 bar

P max

See Table 1

40 bar

MAX DIFFERENTIAL (VALVE OPEN) FLUID

RESPONSE TIME

<1s

RELEASE RANGE

16 / 40 bar

ACCURACY

- 20 / 60 °C

REARMING

AG

5 (Piston) Manually after rectification of fault

POSITION INDICATOR

On mechanism box

Natural Gas with H2S concentration: 85 PPM D55a

Table 1. Flow coefficient,

Connections

P max, relay travel

DN

250 (10-inch)

Bypass

Cg

16870

133

C1

35,5

32,8

Inlet/Outlet: ISO PN 100 B (ANSI 600 RF) Impulse line (IS): 1/4-inch NPT tapped Mechanism box vent (E): 1/4-inch NPT tapped Impulse diameter: Tube interior Ø 8/10 mm Safety contact: See NTAOS2

4,6

P MAX (bar) RELAY TRAVEL (mm)

82 D55b

Material

Description

Body: Steel Connecting part: Steel Orifice: Stainless steel Valve plug: Stainless steel O-rings: HNBR or FKM

The Type OSE NACE consists of: • A body with a removable orifice, enclosed by a connecting part • A valve plug tightshut by an O-ring • An external manual bypass • A release relay type OSD2 including: - A mechanism box (BM) - A safety manometric box (BMS) to be connected on the outlet side of the pressure regulator.

Labeling Table 2. Type OSE NACE Slam-Shut Valve Label

027 NACE

40 bar 5

D56

2

Type OSE NACE Operation The pressure of the zone to be protected (generally the pipe line on the outlet side of the pressure regulator and situated after the slam-shut valve) activates the safety manometric box (BMS).

If the pressure rises above the release set point the release relay frees the valve plug 6.

Due to the weight of the valve plug, the closing spring and the fluid (attempting to close), the valve plug will sit into the orifi ce 7.

The gas flow is obstructed until the mechanism box is manually rearmed.

To reopen the valve plug an equal pressure balance on inlet and outlet sides is required.

Rearming is possible after bypassing is performed using the bypass valve 8.

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The bypass valve should be closed after pressure balance is obtained.

Figure 2. Operational Schematic

Installation

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Figure 3. Type of Installation

• Installation according to EN12186 is recommended.

Safety contact: see NTAOS2 manual.

All interventions on the equipment should only be performed by qualified and trained personnel.

!

• Install according to direction of the fluid flow (see arrow).

WARNING

• When assembling with adjacent elements, care must be taken not to create pressure force on the body and the assembling elements (bolts, O-rings, flanges) should be compatible with the geometry and working conditions of the equipment.

• The slam-shut valve is installed on the inlet side of the regulator , on the horizontal pipeline. The mechanism box should be situated on top (see above schematic).

3

Type OSE NACE !

Verify absence of pressure between inlet and outlet valves

WARNING

• If the case arises a support must be used to avoid pressure force on the body (a support can be installed under the flanges).

• Slam-shut valve plug - Closed

• Connect the safety manometric box (IS) to the impulse at 4D on the outlet pipe.

• Impulse isolation valve - Closed

• Slam-shut bypass - Closed

• Impulse atmospheric valve - Closed

• It is recommended to install an isolation valve (R1) and an atmospheric valve (R2), which can be useful for tripping and verifications.

Set point verification Using the atmospheric valve, inject a pressure equal to the pressure foreseen for the regulator

• No modification should be made to the structure of the equipment (drilling, grinding, soldering...).

• Verify that the inlet side is protected by an appropriate device(s) to avoid exceeding the limits of utilization (PS, TS).

• Verify that the limits of utilization correspond to the appropriate operating conditions.

• Verify that the safety manometric box (BMS) and spring correspond to the appropriate operating conditions on the outlet side of the regulator.

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D63

STAGE 1

• The equipment should not receive any type of shock, especially the release relay.

STAGE 2

Figure 4. Mechanism Trip Stages

• The user should verify or carry out a protection adapted to the environment.

• 1st release relay stage - Set (Stage 1)

• Fire, seismic and lightening are not taken into consideration for standard regulators. If required, a special product selection and/or specific calculations may be supplied according to specific requirements.

• Slam-shut valve - Open (Stage 2) - Progressively increase the pressure to reach tripping - Adjust setting if necessary (NTAOS2) Note the set point value on the equipment or mark it in a commissioning document.

Positions before commissioning

Commissioning

• Impulse isolation valve - Open

All interventions on the equipment should only be performed by qualified and trained personnel.

• Impulse atmospheric valve - Closed

Preliminary Verifications

• Slam-shut valve plug - Closed

Start-up positions

The equipment is ready for commissioning

• Inlet and outlet valves - Closed 4

Type OSE NACE Commissioning (maximum only or maximum

• Regulator - In operation

and minimum)

Inlet and outlet sides of the regulator under pressure

• Inlet valve - Open slowly

Tripping verification

• Slam-shut bypass - Open slowly

• Inlet valve - Closed

• Regulator - Put into operation (see corresponding manual)

• Outlet valve - Closed

• 1st release relay stage - Set (Stage 1) Figure 4

• Regulator - Increase set point to reach tripping (without exceeding the outlet limits)

• Slam-shut valve plug - Open (Stage 2) Figure 4 • Slam-shut bypass - Closed

Trouble Shooting Tips

• Outlet valve - Open slowly

If the valve will not close

Check the release relay Check the slam-shut valve plug

The equipment is commissioned After checking and commissioning the release relay it is recommended to seal it

!

Operating fault

If the valve closes

WARNING

Observe the evolution of the outlet pressure (check tightness) If the outlet pressure in the slam-shut decreases

AUTHORIZED PERSONNEL ONLY Risk of injury After rearming, remove the reset key from the stem. Do not put fingers in or near the reset mechanism area.

or contact after-sales Operating correctly

External leak Locate and seal the leak or contact after-sales

Maintenance

If the outlet pressure in the slam-shut is constant

Servicing Check Recommended frequency:

Bleed off the outlet side of the regulator Observe the evolution of the outlet pressure (check tightness) If the outlet pressure increases

• Twice yearly minimum Verification: • Tripping and tripping value • Slam-shut valve plug tightness Departure positions

Internal leak Check the slam-shut valve plug Check the orifice Check the bypass

• Inlet valve - Open • Outlet valve - Open • Slam-shut valve plug - Open

If the outlet pressure is constant

5

or contact after-sales Valve shut tight

Type OSE NACE Maintenance Disassembly Recommended frequency: • Every 4 to 6 years (or less depending on operating conditions) Verification: • Condition of O-rings, diaphragm, lubrication Replacement: • O-rings, diaphragm Tools: • Spanners: 6, 10, 13 six-sided wrench • Spanner: (see Table 3) • M8 and M10 screws + disassembly tool (approximate length 800) (valve plug disassembly) Table 3. Tightening Screws ITEM

DIMENSION

SPANNER

10

M8

13 mm

TORQUE (N.m) 15

13

1-inch 1/8-8x70 mm

1-11/6-inch

400

19

M8

6 six-sided wrenches

15

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Figure 5. Maintenance Schematic

Disassembly of the valve plug (if required)

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• Remove the square nut 11 • Remove the packing gland 17 • Extract the connector assembly 14/valve cylinder

• V alve plug closed • Inlet and outlet valves closed • Bleed off outlet pressure • Bleed off inlet pressure • Unscrew the impulse connection IS • Remove the BM cover 1 • Remove the travel stop 2 • Unscrew the nuts 3 and 4 • Remove the resetting part 5 • Remove the bolt 6 and the spacer 7 • Remove the cam 8 and yoke 9 • Unscrew the two screws 10 • Remove the BM and fl at joint • Retain the square nut 11 situated at the extremity of the valve angle 12 • Unscrew the screws 13 • Remove the O-ring 24 • DN 200 only: insert a spacer D15 min. - 7.5 x 20 or stack washers of 8 and 6 beneath the square nut 11 • Remove the connector assembly 14/ valve plug 15 and 16

Note: normally this part cannot be dismantled (screw CHc 27fixed with loctite thread locking adhesive) • Remove the spring 18 • Remove the screws 19 and fixing O-ring 20 (pin 21 remains mounted on 15) Disassembly of the valve plug O-ring (if required) • The valve plug body 15 is screwed in the valve plug cylinder 16, the O-ring 22 is reached by unscrewing the above using a bar of 800 and 4 screws (2 M8 on cylinder 16 and 2 M10 on valve plug body 15) The removal of the orifice 28 (not recommended) requires a special extraction tool

Reassembly • Perform the above operations in reverse order (respect tightening torques) • Replace O-rings at each disassembly • Precaution should be taken when removing or replacing the valve plug to avoid damaging the segments 26 • Lubricate screws before tightening (molybdenum graphite grease) • Lightly lubricate O-rings (silicone grease) 6

Type OSE NACE If the valve plug assembly 15/16 has been disassembled:

• Wipe the valve plug O-ring 22 after assembly • Lightly lubricate the valve plug shaft 12 (silicone grease) on the packing gland travel • Check that the spring 18 is correctly positioned • Positioning the O-ring 25:

• Lightly lubricate the valve plug O-ring 22 (silicone grease) • Lubricate the thread of the valve plug cylinder 16 (molybdenum graphite grease) • Positioning the valve plug O-ring 22:

DN 200 Mount on connector part DN 250 Place in the bore of the body

DN 200 Screw the valve plug body 15 partly in the valve plug cylinder 16 and insert the O-ring 22 into the groove before tightening to reach metal/metal contact

The reassembly of a new ori fice 28 requires a special tool • Lubricate the mechanism of the release relay (BM face contact + items 8, 7, 6, 5) (molybdenum graphite grease) • Leave minimum operational space (rotation of the cam/bolt) between the locked nut and the resetting part • Lubricate the BMS spring (molybdenum graphite grease)

DN 250 Place the O-ring 22 into the groove of the valve plug cylinder 16, assemble and screw the valve plug body to reach metal/metal contact

Dimensions and Weights

D59

Figure 6. Dimensional Schematic

Table 4. Dimensions and Weights

DN

250 (10-inch)

DIMENSIONS

PN (B)

ANSI (RF)

A

B

20

150

673

203

50

300

708

222

100

600

752

254

C MAX

D

E

F

667

220

498

363

WEIGHT (kg) 469 504 577 D60

Other sizes PN16/25/40: contact factory

7

Type OSE NACE Spare Parts List Key

Part Number

Description

1 Bypass valve 2 Valve plug O-ring 3 Segments 4 O-ring 5 O-ring Packing gland Release relay OSD2

450 764 400 110 197 534 400 112 400 017 145 254-400 113-400 114 See NTAOSD2 manual

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Figure 7. Type OSE NACE Slam-Shut Valve Assembly

Natural Gas Technologies Europe Bologna, Italy 40013 Tel: 39 051 4190611 Gallardon, France 28320 Tel: +33 (0)2 37 33 47 00 For further information visit www.emersonprocess.com/regulators The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their prospective owners. Fisher is a mark owned by Fisher Controls, Inc., a business of Emerson Process Management.

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Emerson Process Management does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any Emerson Process Management product remains solely with the purchaser .

©Fisher Controls International, Inc., 2004, 2006;All Rights Reserved © Francel S.A. 2006, printed in France by MARCOM Francel Characteristics, dimension and diagrams only commit Francel after written confi rmation