Spirax Sarco Spirax Sarco BSA6T Globe Valve Bellows Sealed Globe Valve

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Description

Spirax Sarco BSA and BSAT bellows sealed globe valves with double bellows seal are designed for use in steam, gas, liquid, condensate and water systems. The standard series BSAT has a throttled spool and stem locking device, the optional series BSA has a flat spool. The products comply with the European Pressure Equipment Directive 97/23/EC and some models are available with EN 10204 3.1 certificate.

Product weight (approximate) kg

caliber BSA2 BSA2T BSA3 (DIN) bsa3 (ansi) ansi 150 bsa3 ansi 300 jis/ks 20k BSA6T PN40
DN15 4 4 5 6 4
DN20 4 5 6 7 5
DN25 5 6 8 9 6
DN32 7 8 - - 8
DN40 10 11 10 11 11
DN50 12 14 12 15 14
DN65 16 19 - - 19
DN80 21 26 25 29 26
DN100 36 44 41 49 44
DN125 52 64 - - -
DN150 75 88 - 94 -
DN200 145 - - - 193

Sealing Grade

Spool-seat sealing in accordance with EN 12266 - 1 Class A and ISO 5208 Class A. BSA3 (ANSI) sealing class in accordance with API 598 zero leakage.

material (that sth is made of)

  • BSA6T Material
    Item Part BSA6T
    1 valve body Stainless steel EN 10213 1.4408 or STM A351 CF8M
    2 bonnet Stainless steel EN 10213 1.4581
    3 Seat Stainless steel EN 10213 1.4408 or STM A351 CF8M
    4 compact disc DN15 - DN40: stainless steel EN 10088 1.4571; DN50 - DN100: stainless steel EN 100222 1.4571
    5 bellow Stainless steel DIN 17440 1.4571
    6 tappet Stainless steel EN 10088 1.4571
    7 handwheels Pressed steel BS 1449 CR4
    8 Stem packing plumbago
    9 Bonnet bolts Stainless steel A4 - 70
    10 Bonnet Nut Stainless steel A4
    11 Body/Bonnet Gasket Stainless steel reinforced flake graphite
    12 locknut DN15 - DN80: steel M8×14mm A2 - 70; DN100 - DN150: steel M8×20mm A2 - 70; DN200 - DN250: steel M12×20mm A2 - 70

Stroke Limit for Throttle Models

Protective covers BSA2T and BSA3T have a threaded hole in the handwheel nut for mounting a travel limiter. Customers supply their own standard bolts and nuts from the table below.

caliber hexagonal bolt
DN15 - DN80 M8×50mm
DN100 - DN150 M12×75mm
DN200 - DN250 M12×100mm

The handwheel nut on the BSA6T also has a threaded hole for the stroke limiter. Customer supplied standard bolts and nuts are the same as above.

Valve body design conditions

  • BSA2T and BSA2
Valve body design conditions PN16 PN25
PMA - Maximum Allowable Pressure 16 bar g 25 bar g
TMA - Maximum Allowable Temperature 350 °C 350 °C
PMO Maximum Working Pressure under Saturated Steam 14.7 bar g 22.3 bar g
TMO Maximum Operating Temperature (Soft Seat) 230 °C 230 °C
TMO Maximum Operating Temperature (Metal Seat) 350 °C 350 °C
Minimum working temperature -10 °C -10 °C
Design maximum cold hydraulic test pressure 24 bar g 38 bar g