Instruction Manual NTABPZ0200 March 2005
BPZ - MPZ
DIRECT -OPERA TED REGULA TOR SUMMARY INTRODUCTION....................................
1
CHARACTERISTICS.............................
2
LABELLING..........................................
2
DESCRIPTION......................................
3
SPARE PARTS .....................................
3
DIMENSIONS ANDWEIGHTS..............
4
OPERATION .........................................
4
INSTALLATION......................................
5
COMMISSIONING................................
6
MAINTENANCE....................................
7
Type BPZ - MPZ
INTRODUCTION The BPZ is a direct-operated, spring set point pressure regulator, used for supplying small industries, commercial business, residential complexes and small antenna networks. Two versions exist: • BPZ VSX2 for an outlet pressure of 21 and 27 mbar, • MPZ VSX2 for an outlet pressure of 300 mbar. The MPZ version is especially adapted for supplying boilers. Both versions are equipped with the same balanced valve plug which assures a constant outlet pressure level even in the case of inlet pressure variations.
They can be equipped with a slam shut type VSX2 LP which permits the gas flow to be cut off rapidly and totally in the case of over or under outlet pressure. As a standard feature theBPZ and MPZ are equipped with a mechanical dampener and a travel stop for the case of over pressure. As a standard feature theBPZ and MPZ can be delivered with a slam shut.
02/03/2007
The BPZ and MPZ are in conformity with the Pressure Equipement Directive PED 97/23/CE and apply to article 3.3.
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Instruction Manual NTABPZ0200 March 2005
BPZ - MPZ
CHARACTERISTICS
REGULATOR Accuracy
PS TS
AC SG DN DN BPZ MPZ
Inlet diameter Outlet diameter Max. flow for Pe 0.7 bar
4 bar 0.5 bar - 20 / 60 °C
MATERIAL Body Ductile iron Diaphragm tightening part Aluminium Actuator Aluminium Regulator/Slam shut orifice Brass Regulator valve plug Aluminium Slam shut valve plug Aluminium Regulator/Slam shut plug disc Nitrile
5 10 1’’ 2’’1/4 160 m3 /h(n) 208 m3 /h(n)
CONNECTIONS Inlet:
Female GAZ for sphero-conicalconnection* Outlet: Male GAZfor 2 straight connection parts* Actuator impulse ISM : 3/8" GAZ tapped Actuator vent: 1/2" GAZ tapped Impulse connection pipe: Internal pipe Ø >= 12 mm Slam shut impulse IS: 1/4" NPT tapped VSX2 impulse connecting pipe:Internal pipe Ø>= 4 mm Slam shut vent: 1/4" NPT tapped
Set point spring, range and flow Pa (mbar) Nominale 21 27 300
See NTAVSX2
SLAM SHUT
Operating pressure Body, Valve plug, Slam shut Actuator Operating temperature
Spring Wire Ø Length (mm) (mm)
Spring code
Min.
Max.
15
40
1,8
60
145 298
260
340
2,6
80
142 862 B37
* Connections supplied upon request
LABELLING BPZ
MPZ
REGULAR REGULATOR LABEL (example)
SPECIFIC REGULATOR LABEL (example)
VSX2 SLAM SHUT LABEL (example)
B36
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Instruction Manual NTABPZ0200 March 2005
BPZ - MPZ
DESCRIPTION The BPZ-MPS consists of: A version without an integral slam shut: • A body, a diaphragm actuator, a bottom • A diaphragm-balanced valve plug, an orifice, a mechanism assembly - A Pa set point adjustment spring. A version with an integral slam shut type VSX2LP: • A body, a diaphragm actuator • A diaphragm-balanced valve plug, an orifice, a mechanism assembly
• An integral bypass slam shut in the place of the bottom (see NTAVSX2) - A Pa set point adjustment spring - A tripping spring set to max. - A tripping spring set to min. Orientation and regulator impulse line The actuator can be orientated to 360° from 90° to 90° The slam shut can be oriented to 360°.
SPARE PARTS
B38
Item Designation 1 2 3 4 5 6 7 8
Orifice O-ring Valve plug assembly O-ring O-ring Packing gland Holding pin Diaphragm
Spare part kit (commissioning spares)
BPZ
MPZ
Item
144 397 400 069 181 129 400 067 400 709 135 853 400 021 144 297 144 407
197 442
Designation
BPZ
9 10 11 12 13 14 15 16
With Slam Shut Circlips Spring Valve plug Bypass O-ring Pe tightshut O-ring Pa tightshut O-ring Diaphragm assembly VSX2LP slam shut assembly
17
Bottom O-ring
MPZ 406 153 144 064 142 130 400 501 400 081 400 074 181 017 196 433
Without Slam Shut
197 443
400 081 B39
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Instruction Manual NTABPZ0200 March 2005
BPZ - MPZ
DIMENSIONS AND WEIGHTS
Weight:
With slam shuttype VSX2 Without slam shut
4.5 kg 3.7 kg
* Disassembly dimensions * * Dimensions without slam shut
B40
OPERATION The BPZ - MPZ is a pressure regulator with expansion achieved by a balanced valve plug and pressure control by a directoperated actuator. The expansion is achieved between the regulator valve plug3 and the orifice1. Tight shutoff is ensured by the regulator plug disc 2 pushing against the orifice1. Pressure control is achieved through the diaphragm6 which receives on the one side the outlet pressurePa, and on the other side the spring load, adjusted to the desired value by the set point spring 7. The quality of the pressure control is achieved by the set point spring 7 whose characteristics are grouped with those of the regulator diaphragm6. Accuracy is ensured, independent of inlet and outlet pressure, by the balance of the valve plug3/stem 9 assembly. A mechanism8 equipped with lateral springs compensates variations of the set point spring7 force.
B41
The regulator can be equipped with a slam shut10 using a release relay 11 type VSX2.
Due to the force of the spring7 and the mechanism8, the regulator OPENS.
In the case of brief over pressure, the diaphragm plate 6 will travel up to the actuator cap5 without any leak or deterioration of the components (disconnecting spring 4).
CLOSING
OPENING
As the flow decreases, the outlet pressure increases on the outlet side of the regulator.
As the flow increases, the outlet pressure decreases on the outlet side of the regulator and on the regulator diaphragm 6.
The force of the pressure on the regulator diaphragm6 is overcome by that of the spring7, the regulator CLOSES. 4
Instruction Manual NTABPZ0200 March 2005
BPZ - MPZ
INSTALLATION
B42
All interventions on the equipment should only be performed by qualified and trained personnel.
!
! • The regulator is installed on clean horizontal or vertical pipeline. Version with slam shut, the release relay can be situated towards the top or towards the bottom. • Install according to the direction of the fluid flow (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. • Version with integral slam shut, connect the safety manometric box (IS) to the impulse at 4D on a straight run of the outlet pipe. • It is recommended to separate the slam shut impulse line (IS) from that of the actuator (ISM). Do not connect the impulses on the lower generator line. • Version with integral slam shut, it is recommended to install an isolation valve (R1) and an atmospheric valve (R2), which are useful for tripping and verifications.
• Connect the actuator (ISM) to the impulse at 4D minimum on a straight run of the outlet pipe. • It is recommended to install a servicing valve (R3) on the outlet pipeline to facilitate adjustments and bleeding off to the atmosphere. • 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. • Version without slam shut, verify that a pressure limiting device on the outlet side of the regulator guarantees a pressure limit < or equal to the actuator PS. • 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. • Version with slam shut, verify that the springs correspond to the appropriate operating conditions on the outlet side of the regulator.
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Instruction Manual NTABPZ0200 March 2005
BPZ - MPZ
COMMISSIONING Operations concerning the integral slam shut version are in italic.
All interventions on the equipment should only be performed by qualified personnel.
B43
PRELIMINARY VERIFICATIONS Start-up positions
Positions before commissioning • Impulse line isolating valve (R1) Open • Impulse line atmospheric valve (R2) Closed • Slam shut valve plug Closed • Servicing valve (R3) Closed The equipment is ready to be commissioned
• Inlet and outlet valves Closed Verify the absence of pressure between inlet and outlet valves • Set point adjustment screw Unscrewed (case 1) or set (case 2) • Slam shut valve plug Closed • Impulse line isolation valve (R1) Closed
COMMISSIONING • Inlet valve Open very slowly • Slam shut valve plug Slowly unscrew (bypassing) Verify that the outlet pressure corresponds to the set point required If not, adjust the regulator set point (adjustment screw) Pull (set, when the bypassing is finished) Gently push back and turn
Slam shut set point verification Using the atmospheric valve (R2), inject a pressure equal to the pressure required for the regulator • Slam shut valve plug Set (unscrew, pull, turn the resetting button (see NTAVSX2)) Progressively increase the pressure to reach tripping Adjust setting if necessary (See NTAVSX2)
The equipment is commissioned It is recommended to seal the release relay
Note the set point value on the equipment or mark it on a commissioning document 6
Instruction Manual NTABPZ0200 March 2005
BPZ - MPZ
MAINTENANCE Departure positions
Operations concerning the integral slam shut version are in italic.
• Inlet valve Open • Outlet valve Open • Slam shut valve plug Open • Regulator In operation Inlet and outlet side under pressure
SERVICING CHECK Recommended frequency: • Once yearly minimum Verification: • • • •
Tightshut verification (and tripping verification for integral slam shut versions)
Verification of the set point Regulator valve plug tightness Tripping and slam shut valve plug set point value (see NTAVSX2) Slam shut valve plug tightness
• Inlet valve • Outlet valve • Regulator
If the outlet pressure increases
If the outlet pressure decreases If the outlet pressure is constant
Closed Closed Observe the evolutionof the outlet pressure (control regulator tightness)
Internal leak Control the regulator valve plug Control the regulator orifice
or contact after-sales
External leak Locate and seal the leak
or contact after-sales
The regulator is tightshut Close the impulse line isolation valve Open the impulse line atmospheric valve Progressively inject pressure (without exceeding the outlet limits)
If the slam shut valve plug will not close
Operating fault Control the slam shut valve plug
If the slam shut valve plug closes Observe the evolution of the outlet pressure (control tightness)
or contact after-sales
Operating correctly
If the outlet pressure is constant Purge the outlet side of the regulator Observe the evolution of the outlet pressure (control tightness) If the outlet pressure increases
Internal leak Control the slam shut valve plug Control the slam shut orifice Control the internal bypass
If the outlet pressure is constant
Slam shut valve plug is tightshut
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or contact after-sales
Instruction Manual NTABPZ0200 March 2005
BPZ - MPZ
MAINTENANCE REGULATOR AND SLAM SHUTDISASSEMBLY RECOMMENDED FREQUENCY: • Every 6 to 8 years (or less depending on operating conditions) Verification: • Condition of diaphragms, valve disc plug, lubrication Replacement: • O-rings, diaphragms (depending on condition and length of usage) Tools: • Male spanners for six-sided wrench 2.5 and 3 • Flat spanner 10, 13 • Box spanner 38 • Adjustment spanner for VSX2 Ref. 197 226 REGULATOR • Valve plug closed (no flow) Spanner Torque (N.m) • Close inlet and outlet valves • Bleed off outlet pressure 10 6 13 15 • Bleed off inlet pressure B45 • Disconnect impulse lineISM • Free nut 8 • Unscrew and remove the adjustment screw9 WARNING concerning MPZ : precompressed spring (~ 60 N) • Unscrew the actuator screw6 • Remover the cover 7 • Unscrew the main diaphragm assembly10 • Unscrew screws 5 and remove the actuator body • Control the O-ring3 • Remove the valve plug assembly4 • Unscrew the orifice2 • Control the O-ring1
B44
REASSEMBLY • Perform the above operations in reverse order (respect tightening torques) • Change diaphragms every 6 years or less depending on condition • Replace O-rings at each disassembly • Lubricate screws before tightening • Lightly lubricate O-rings (silicone grease) • Lightly lubricate the valve plug stem (silicone grease) • Lightly lubricate the slam shut valve plug stem (silicone grease) • Lubricate springs (molydbenum graphite grease)
SLAM SHUT (version with integral slam shut) • Disconnect the impulse tubeIS • Unscrew screws 12 and remove slam shut VSX2 • Disassembly: see NTAVSX2
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