Instruction Manual NTAOSENACE0603
Type OSE NACE
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 ďŹ‚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)).
The Type OSE NACE is in conformity with the NACE standard MR0175 - 2001.
Type OSE NACE Characteristics OPERATING PRESSURE 40 bar max
ACCORDING TO PN (SEE TABLE 2) (BMS ASSOCIATED, ACCORDING TO SIZE)
MAX DIFFERENTIAL (VALVE CLOSED)
See Table 1
MAX DIFFERENTIAL (VALVE OPEN) FLUID
16 / 40 bar
- 20 / 60 °C
5 (Piston) Manually after rectiﬁcation of fault
On mechanism box
Natural Gas with H2S concentration: 85 PPM D55a
Table 1. Flow coefficient,
P max, relay travel
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
P MAX (bar) RELAY TRAVEL (mm)
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
40 bar 5
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.
The bypass valve should be closed after pressure balance is obtained.
Figure 2. Operational Schematic
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).
• 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).
Type OSE NACE !
Verify absence of pressure between inlet and outlet valves
• 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.
• The equipment should not receive any type of shock, especially the release relay.
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
• Impulse isolation valve - Open
All interventions on the equipment should only be performed by qualiﬁed and trained personnel.
• Impulse atmospheric valve - Closed
• Slam-shut valve plug - Closed
The equipment is ready for commissioning
• Inlet and outlet valves - Closed 4
Type OSE NACE Commissioning (maximum only or maximum
• Regulator - In operation
Inlet and outlet sides of the regulator under pressure
• Inlet valve - Open slowly
• 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
If the valve closes
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
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
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
TORQUE (N.m) 15
1-inch 1/8-8x70 mm
6 six-sided wrenches
Figure 5. Maintenance Schematic
Disassembly of the valve plug (if required)
• 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
Figure 6. Dimensional Schematic
Table 4. Dimensions and Weights
WEIGHT (kg) 469 504 577 D60
Other sizes PN16/25/40: contact factory
Type OSE NACE Spare Parts List Key
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
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. The contents of this publication are presented for informational purposes only , and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability . We reserve the right to modify or improve the designs or speciﬁcations of such products at any time without notice. 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
Published on Jun 26, 2011
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