Hygienic sandwich butterfly valve 3A, 316L Stainless Steel
SY-DFBTV10
Sangyie Hygienic sandwich butterfly valves are designed to regulate the flow efficiently in stainless steel pipe systems of hygienic and high-purity process applications. Widely used in heat exchanger, AI liquid cooling systems, food-processing, beverages, brewing, wine, dairy, cosmetic, personal care, pharmaceutical, biotechnology and semiconductor industries.
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SangyieHygienic sandwich butterfly valves are designed to regulate the flow efficiently in stainless steel pipe systems of hygienic and high-purity process applications. Widely used in heat exchanger, AI liquid cooling systems, food-processing, beverages, brewing, wine, dairy, cosmetic, personal care, pharmaceutical, biotechnology and semiconductor industries.
Hygienic sandwich butterfly valve Technical features
● Easily interchangeable with manual handles, pneumatic actuators and electric actuators
● Forged valve body and disc
● Low pressure losses
● Low flow resistance
● Easy to install, align and service
● Easy to upgrade
● Inlet & outlet interchangeable with any connection types
● Production process complies with 3A, DIN, ISO sanitary valve norms
Hygienic sandwich butterfly valve Technical parameters
Stock size | 1/2" ~10", DN15 ~ DN250 | |
Temperature | Working temperature | EPDM, -20 ~ 130°C, -4 ~ 266°F VMQ, -50 ~ 180°C, -58 ~ 356°F FPM, -30 ~ 230°C, -22 ~ 446°F Other materials are available upon request |
Sterilization temperature | 150°C, 302°F, Max. 20 min | |
Working pressure | 1/2" ~ 4", DN15 ~ DN100 | vacuum to10bar, 145psi |
5" ~ 6", DN125 ~ DN150 | vacuum to 8bar, 116psi | |
8" ~10", DN200 ~ DN250 | vacuum to 5bar, 72psi | |
Surface finish | Internal Ra16-32µin, 0.4-0.8µm External machined | |
Pipe joint standard | DIN, SMS, BS / RJT, 3A, ISO / IDF, ASME / BPE | |
Connection type | welded, clamped, threaded, flanged,or others upon request | |
Materials
●Medium wetted steel parts EN 1.4301 (AISI 304), EN 1.4404, EN 1.4435(AISI 316L)
● Other St.St. Parts EN 1.4301 (AISI 304)
● Valve seat/seal EPDM, SILICONE, FPM, VQM, NBR, HNBR
Options
● Single-acting pneumatic actuator
● Double-acting pneumatic actuator
● Electric actuator
● Inductive position sensors
● C-TOP control unit
●Positioner
● Pull handle (2-4 positions)
● Plastic squeeze handle (13 positions)
● Stainless steel squeeze handle (13 positions)
Hygienic sandwich butterfly valve Data sheet

| Model no | Size | D1 | Dn | L | L1 | H | KxK |
| SY-DFBTV1011004E10050 | 1/2" | 12.7 | 9.4 | 100 | 126 | 78 | 8x8 |
| SY-DFBTV1011004E10075 | 3/4" | 19.1 | 15.8 | 100 | 126 | 78 | 8x8 |
| SY-DFBTV1011004E10100 | 1" | 25.4 | 22.1 | 100 | 126 | 78 | 8x8 |
| SY-DFBTV1011004E10125 | 1-1/4" | 31.8 | 28.5 | 100 | 126 | 78 | 8x8 |
| SY-DFBTV1011004E10150 | 1 1/2" | 38.1 | 34.8 | 100 | 126 | 78 | 8x8 |
| SY-DFBTV1011004E10200 | 2" | 50.8 | 47.5 | 104 | 126 | 102 | 10x10 |
| SY-DFBTV1011004E10250 | 2 1/2" | 63.5 | 60.2 | 112 | 144 | 115 | 10x10 |
| SY-DFBTV1011004E10300 | 3" | 76.2 | 72.9 | 112 | 144 | 128 | 10x10 |
| SY-DFBTV1011004E10350 | 3 1/2" | 88.9 | 84.9 | 120 | 160 | 139 | 11x11 |
| SY-DFBTV1011004E10400 | 4" | 101.6 | 97.4 | 128 | 160 | 154 | 11x11 |
| SY-DFBTV1011004E10500 | 5" | 127 | 123 | 160 | 220 | 185 | 14x14 |
| SY-DFBTV1011004E10600 | 6" | 152.4 | 146.9 | 180 | 220 | 215 | 14x14 |
| SY-DFBTV1011004E10800 | 8" | 203.2 | 197.7 | 180 | 284 | 285 | 14x14 |
| SY-DFBTV1011004E11000 | 10" | 254 | 247.2 | 180 | 284 | 340 | 14x14 |
| SY-DFBTV1011004E20010 | DN10 | 12/13 | 9/10 | 100 | 126 | 78 | 8x8 |
| SY-DFBTV1011004E20015 | DN15 | 18/19 | 15/16 | 100 | 126 | 78 | 8x8 |
| SY-DFBTV1011004E20020 | DN20 | 22/23 | 19/20 | 100 | 126 | 78 | 8x8 |
| SY-DFBTV1011004E20025 | DN25 | 28/29 | 25/26 | 100 | 126 | 78 | 8x8 |
| SY-DFBTV1011004E20032 | DN32 | 34/35 | 31/32 | 100 | 126 | 86 | 8x8 |
| SY-DFBTV1011004E20040 | DN40 | 40/41 | 37/38 | 100 | 126 | 90 | 8x8 |
| SY-DFBTV1011004E20050 | DN50 | 52/53 | 49/50 | 104 | 126 | 106 | 10x10 |
| SY-DFBTV1011004E20065 | DN65 | 70 | 66 | 112 | 144 | 124 | 10x10 |
| SY-DFBTV1011004E20080 | DN80 | 85 | 81 | 120 | 160 | 139 | 11x11 |
| SY-DFBTV1011004E20100 | DN100 | 104 | 100 | 128 | 160 | 159 | 11x11 |
| SY-DFBTV1011004E20125 | DN125 | 129 | 125 | 160 | 220 | 185 | 14x14 |
| SY-DFBTV1011004E20150 | DN150 | 154 | 150 | 180 | 220 | 215 | 14x14 |
| SY-DFBTV1011004E20200 | DN200 | 204 | 200 | 180 | 284 | 285 | 14x14 |
| SY-DFBTV1011004E20250 | DN250 | 254 | 250 | 180 | 284 | 340 | 14x14 |
| SY-DFBTV1011004E20300 | DN300 | 305 | 300 | 200 | 350 | 400 | 14x14 |
Application Sectors
●Dairy industry: Milk storage tanks, yogurt fermentation tanks, cream mixing vessels
●Beverage & food: Juice, wine, beer, syrup, edible oil, sauce processing tanks
●Pharmaceutical & biotech: API preparation tanks, sterile liquid storage, cell culture bioreactors
●Cosmetic & personal care: Lotion, essence, cream, shampoo blending tanks
●Water treatment: Purified water, WFI (Water for Injection) storage and distribution systems
●Cooling systems
Applicable Media
Liquid materials, viscous slurries, low-concentration acid/alkaline cleaning fluids, sterile pure water, fermentation broths, oil-based emulsions, alcohol solvents
Factory Testing Items
● Raw material spectrum inspection for stainless steel components
●Surface roughness detection of all wetted parts
●Water pressure shell strength test at 1.5 times nominal pressure
●Air tightness leakage test for valve cavity and stem
●CIP high-temperature circulation aging simulation test for seals
Video