401N

401N

Butterfly double offset valves 401N series.

Size range 3” ÷ 56” (DN80 ÷ DN1400)
Type Wafer, Lug, Double flanged on request
Design ASME B16.34, EN 12516-2, EN 593
Face to face API 609, EN 558
Operating temperature -40°C + 220°C (-40 °F ÷ +428 °F)
Pressure ratings ASME class 150 – bidirectional
Flange drilling ASME B16.5, ASME B16.47 series A, EN1092-1
Testing API 598, EN 12266-1
Leakage class Rate “A” – No leakage – according to EN 12266-1
Standard materials Body: Ductile Iron, Carbon Steel, Stainles Steel
Disc: Ductile Iron, Carbon Steel, Stainles Steel
Stem: AISI 304, AISI 316, AISI 630
Seat: PTFE + Carbographite
INCONEL 625 LCF on request for metal to metal seated
Applications Chemical and Pharmaceutical industries, sistems for solvent recovery,
other applications with compatible materials to working conditions
Certifications 97/23/CE PED, 94/9/CE ATEX, Fire Safe API 607, ISO 10497, API 6FA (on request)
SIL – IEC 61508, IEC 61511, GOST-R, CU TR 10 – CU TR 32

Introduction: Double Eccentricity Butterfly Valve Series 401N

This is a new range of butterfly valves of the double eccentricity type with “bubble tight” seal, designed for heavy duty service, especially as regards to shipbuilding and petrochemical sectors.

Above all it is ideal for shut-off and/or flow control of aggressive fluids or gases.

Awide variety ofmaterials can be used tomake the valve; those falling, in the standard range are.

- Ductile Iron (only fromND350 and bigger size)

- CarboonSteel

- StainlessSteel

- AluminiumBronze (only on request)

Such valves are manufactured according to the most up-to date design criteria, thereby offering maximum guarantee of correct operation and minimum maintenance.

 

Constructive features

The valve body is of WAFER type with 4 centering holes for facilitating the mounting between the flanges or else of LUG type with threaded or throught lugs when the valve is to be used as a foot valve.

The butterfly disc is of the double eccentricity type. This design feature ensures a particularly favourable affect either for flow control or in the opening and closing movement. In fact, the butterfly disc has two surfaces which are different from the degree of the valve opening. This results in a moment of rotation which prevents any possible valve floating.

The seal on the upper stemis of the adjustable type and consist of a CHEVRON pack mode of P.T.F.E. + Carbographite, on which a stuffing box acts. When the stem seal requires replacement, such operation can be performed without having to remove the valve from the piping.

The stem is made from ‘h8’ ground bar, and besides being guided by c.s. + P.T.F.E. or s.s. + P.T.F.E. PAP bushings, it guarantees a perfectly tight shutt-off on the stuffing box. The stem is integral with the butterfly disc throught parallel key and tapered pins. A plug with P.T.F.E. O-ring ensures perfectly tight seal on the lower stem.

The seat retaining ring is embedded in the body, according to API 609, and it serves to keep the valve seat in its place. A phonographic groove is machined on the outside of the ring to ensure tight shutt-off between the valve and the flange through a common seal.

The seat is a drop-shaped section solid P.T.F.E. + Carbographite profile, which is in direct contact with the process fluid. Thanks to this solution, the seat can be replaced without having to fully disassemble the valve fromthe piping.

mat-Exploded-view
Carbon Steel Configuration Stainless Steel Configuration   
ItemDescriptionMaterialsItemDescriptionMaterials
1** Body Carbon Steel ASTM A215 gr. WCB1** Body Stainless Steel ASTM A351 gr. CF8M
Carbon Steel S355J2 EN10210 or similar2**DiscStainless Steel ASTM A351 gr. CF8M
Ductile Iron EN GJS 400/153*SeatPTFE + Carbographite
2**DiscCarbon Steel ASTM A215 gr. WCB4** Ring SeatCarbon Steel S355J2 EN10210 or similar
Carbon Steel S355J2 EN10210 or similarStainless Steel ASTM A351 gr. CF8M
Ductile Iron EN GJS 400/155** StemStainless Steel AISI 316
3*SeatSeat PTFE + CarbographiteStainless Steel AISI 630
4** Ring SeatCarbon Steel S355J2 EN10210 or similar6Disk KeyStainless Steel AISI 316
5** StemStainless Steel AISI 4207Upper KeyStainless Steel AISI 316
6Disk KeyStainless Steel AISI 3168Stuffing Box GlandStainless Steel AISI 316
7Upper KeyStainless Steel AISI 3169Stuffing Box PlateStainless Steel AISI 316
8Stuffing Box GlandNichel-Plated Carbon Steel10Anti-Blowout RingStainless Steel AISI 316
9Stuffing Box PlateNichel-Plated Carbon Steel11* Stuffing Box PTFE + Carbographite
10Anti-Blowout RingStainless Steel AISI 31612Bushing PAPStainless Steel AISI 316 + PTFE
11* Stuffing Box PTFE + Carbographite13Thrust RingStainless Steel AISI 316
12Bushing PAPCarbon Steel + PTFE14** PlugStainless Steel AISI 316
13Thrust RingStainless Steel AISI 31615** Tapered PinStainless Steel AISI 316
14** PlugCarbon Steel16BracketStainless Steel ASTM A351 gr. CF8M
15** Tapered PinStainless Steel AISI 31617ScrewStainless Steel A2
16BracketDuctile Iron EN GJS 400/1518Stuffing Box ScrewStainless Steel A2
17ScrewCarbon Steel 8.8 Galvanized19ScrewStainless Steel A2
18Stuffing Box ScrewCarbon Steel 8.8 Galvanized20ScrewStainless Steel A2
19ScrewCarbon Steel 8.8 Galvanized21LockWasherStainless Steel A2
20ScrewCarbon Steel 8.8 Galvanized22NutStainless Steel A2
21LockWasherGalvanized Carbon Steel23* O-RingPTFE
22NutGalvanized Carbon Steel
23*O-RingPTFE* Spare parts suggested
** Other materials on request
* Spare parts suggested
** Other materials on request

Overall-dimensions-of-S401N-butterfly-valves-ND80-ND300-WAFER-type  
             
DNABCØDJK maxL maxSxSHØR1ØR2
mminc
8032901711191274617.862.514x1415F07F10
10043221881341575228.689.214x1415F07F10
1255343198.5144.51865638.1113.114x1415F07F10
15063792181612155651.2140.417x1718F10F12
20084472501972706171.8187.122x2223F10F12
250105353022333206894.6236.322x2223F12F14
3001258832826037078116.1285.922x2229F12F14
Overall-dimensions-of-S401N-butterfly-valves-ND350-ND700-WAFER-type  
               
DNABCDØGJK maxL maxE?FPØR1ØR2
mminc
35014603306297714209213333060358x7x45F12F14
40016656656323714701021533796044.514x9x45F12F14
45018709709341715321141684266044.514x9x45F12F14
50020774774379715841271964856044.514x9x45F12F14
60024929929457126685154220565905516x10x480F14F16
7002810571057527156795165275665905516x10x480F14F16

Technical manual

ATEX DECLARATION-S401N-UK-IT

PED DECLARATION- S401N-UK-IT

USE MANUAL -S401N-IT-RU

USE MANUAL- S401N-IT-UK

USE MANUAL-S401N-DE-UK

DIMENSIONAL DRAWING -S401N-DN350÷DN700

DIMENSIONAL DRAWING-S401N- DN80÷DN300

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