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SPW Parabolic Plug Bellows Sealing Type0 pages
SPW Parabolic Plug Bellows Sealing Type
Based STP structure, Sealing bellows are increased in SPW. The pressure-proof and elastic
stainless steel bellows is tightly seal-welded to the valve stem and upper adapter ring. For safety
reasons the construction includes a standard stem sealing as back-up in case of bellows failure.
SPW series is available for process fluids when stem leakage can't be tolerated at all(e.g. toxic
fluids).
¡ Standard Specification
Valve Body
Type: Cast globe Valve
Nominal Size: DN 15, 20, 25, 32, 40, 50, 65, 80, 100,
150, 200, 250, 300
Nominal Pressure: ANSI 150, 300
DIN PN16, 25, 40
JIS 10K, 20K, 30K
GB PN1.6, 2.5, 4.0 MPa
End Connection: Flange ANSI B16.5 RF, RTJ
DIN2543/2544/2545 RF
JISB2201 RF
JB/T81 RF
JB/T82.2 FM
Weld: ANSI B16.5 SWiDN50j; BWiDN„50j
Face to Face Dimension:
ANSI150RF, JIS10K iIEC60534-3-1 37 Seriesj
ANSI300RF, JIS20K, JIS30K iIEC60534-3-1 38 Seriesj
ANSI150/300 RTJ iASME B16.10 CLASS 150/300RTJj
DIN PN16, 25, 40 iDIN3202-F1j
GB PN1.6, 2.5, 4.0 MPa iISO5752 1 Seriesj
Please refer to table 6.1~6.4
Body MaterialFPlease refer to table1 Please refer to figure 3 for Operated Temp. &Pressure Range
Bonnet TypeFBellows type……-46Ž`350Ž
(Please pay attention to the different Temp. &Pressure Range of material)
Packing MaterialFPTFE V-ring compound packingAgraphite compound packingA
graphite packing,
Operating Temp. &Pressure range is shown in table 2Cfigure2
Seal GasketFSpiral wound gasketiPTFE+316AFlexible Graphite+316j,
Graphite with metal gasketiGraphite+316AGraphite+304j
