The Sanitary 3A Union from VTY factory is a pipe fitting widely used in the hygienic processing industry. The 3A union is designed according to 3A standard, which is a gold standard that makes cleanliness a regulatory requirement. These unions are manufactured to suit imperial and metric tubes, making them widely used in the global fluid processing industry.
The complete 3A union consists of a round slotted nut, a weld liner and weld male, and an O-ring seal. VTY can offer a wide range of 3A unions are widely used in the USA, Germany, France and the UK.
Multiple Applications: food, beverage, dairy, biotech, pharmacy industries.
Elegant and smooth surface to eliminate microbial adhesion.
Ideal for use in high temperature process pipe work.
| Item | Specification |
|---|---|
| Size Range | 1’’-4’’ |
| Specification | 3A standard |
| Material | 304, 304L, 316L (forged) |
| Seal | NBR, Silicone, EPDM, FPM, PTFE |
| Roughness | Ra=0.4~0.8µm (internal), Ra≤1.6µm (external) |
Service life is affected by many factors including material quality, use environment and medium nature. High quality Sanitary 3A Unions can be used for a long time under normal use and regular maintenance. However, gaskets should be replaced regularly to ensure a sealed environment. We recommend making a plan for checks according to the frequency of use.
Extreme temperatures can affect union performance and seal material. At low temperatures, some seal materials may become harder or lose their elasticity, affecting seal performance. High temperatures may accelerate the aging of materials or cause thermal expansion and contraction, leading to a loose connection
VTY is a state-certified high-tech enterprise with over 10 years of experience in hygienic fluid components. Our 3A unions offer:
Each VTY 3A union undergoes:
All records are traceable. Test reports & 3A Declaration of Conformity are available with shipment.
3A focuses on cleanability and surface roughness for dairy and pharmaceutical applications. DIN standards are commonly used in Europe but differ in structure and sealing. VTY offers both.
Yes. We support both inch and metric sizes and accept custom orders based on drawings or samples.
Typically Ra ≤ 0.8µm per 3A standard. VTY can achieve Ra ≤ 0.4µm for stricter requirements.
Yes, mainly on the seal material:
VTY provides different seal materials to match operating conditions.
Yes. We can provide a 3A Declaration of Conformity along with material test reports per shipment.
Standard sizes: 15–25 days (adjustable based on production schedule)
Custom orders: based on complexity
VTY supports custom manufacturing based on drawings or samples.
Send us your requirements – we will reply with a technical proposal within 24 hours.
(Contact form vty@wzvty.com / +86-13567797796 )
| Size | A | B | H | SW | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1.0" | 38.02×8TPIACME | 30.3 | 23 | 46 | |||||||
| 1.5" | 51.54×8TPIACME | 43.4 | 24.6 | 61.1 | |||||||
| 2.0" | 65.05×8TPIACME | 56.5 | 27 | 76.2 | |||||||
| 2.5" | 78.56×8TPIACME | 69.6 | 29.6 | 91.3 | |||||||
| 3.0" | 92.08×8TPIACME | 82.7 | 32.5 | 106.4 | |||||||
| 4.0" | 120.14×6TPI ACME | 108.9 | 38.1 | 137.6 | |||||||
| Size | A | B | C | H | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1.0" | 22.1 | 25.4 | 33.3 | 18.2 | |||||||
| 1.5" | 34.8 | 38.1 | 46.9 | 18.2 | |||||||
| 2.0" | 47.5 | 50.8 | 60.5 | 19 | |||||||
| 2.5" | 60.2 | 63.5 | 74 | 22.2 | |||||||
| 3.0" | 72.9 | 76.2 | 87.5 | 23.1 | |||||||
| 4.0" | 97.38 | 101.6 | 114.5 | 26.2 | |||||||
| Size | A | B | C | H | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1.0" | 22.1 | 25.4 | 37.13×8TPI ACME | 18.3 | |||||||
| 1.5” | 34.8 | 38.1 | 50.65×8TPI ACME | 18.3 | |||||||
| 2.0" | 47.5 | 50.8 | 64.16×8TPI ACME | 19.1 | |||||||
| 2.5" | 60.2 | 63.5 | 77.67×8TPIACME | 22.2 | |||||||
| 3.0" | 72.9 | 76.2 | 91.19×8TPI ACME | 23.1 | |||||||
| 4.0" | 97.38 | 101.6 | 119.25×6TPIACME | 26.2 | |||||||
| Size | A | B | H | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1.0" | 22.1 | 33.3 | 11.9 | ||||||||
| 1.5" | 34.8 | 46.9 | 14.3 | ||||||||
| 2.0" | 47.5 | 60.5 | 15.9 | ||||||||
| 2.5" | 60.2 | 74 | 16.7 | ||||||||
| 3.0" | 72.9 | 87.5 | 18.3 | ||||||||
| 4.0" | 97.38 | 114.5 | 20.6 |
| Size | A | B | C | H | ||
|---|---|---|---|---|---|---|
| 1.0" | 22.1 | 25.4 | 33.3 | 34.9 | ||
| 1.5" | 34.8 | 38.1 | 46.9 | 38.1 | ||
| 2.0" | 47.5 | 50.8 | 60.5 | 38.1 | ||
| 2.5" | 60.2 | 63.5 | 74 | 44.5 | ||
| 3.0" | 72.9 | 76.2 | 87.5 | 44.5 | ||
| 4.0" | 97.38 | 101.6 | 114.5 | 44.5 | ||
| Size | A | B | C | H | ||
|---|---|---|---|---|---|---|
| 1.0" | 22.1 | 25.4 | 37.13×8TPIACME | 34.9 | ||
| 1.5" | 34.8 | 38.1 | 50.65×8TPIACME | 38.1 | ||
| 2.0" | 47.5 | 50.8 | 64.16×8TPIACME | 38.1 | ||
| 2.5" | 60.2 | 63.5 | 77.67×8TPIACME | 44.5 | ||
| 3.0" | 72.9 | 76.2 | 91.19×8TPIACME | 44.5 | ||
| 4.0" | 97.38 | 101.6 | 119.25×6TPIACME | 44.5 | ||
| Size | A | B | C | H | ||
|---|---|---|---|---|---|---|
| 1.0" | 25.5 | 29.5 | 33.3 | 19.1 | ||
| 1.5" | 38.2 | 42.6 | 46.9 | 28.6 | ||
| 2.0" | 50.9 | 55.7 | 60.5 | 33.3 | ||
| 2.5" | 63.6 | 68.8 | 74 | 34.9 | ||
| 3.0" | 76.3 | 81.9 | 87.5 | 36.5 | ||
| 4.0" | 101.7 | 108.1 | 114.5 | 38.1 | ||
| Size | A | B | C | H | ||
|---|---|---|---|---|---|---|
| 1.0" | 25.5 | 29.5 | 37.13×8TPIACME | 20.6 | ||
| 1.5" | 38.2 | 42.6 | 50.65×8TPIACME | 28.6 | ||
| 2.0" | 50.9 | 55.7 | 64.16×8TPIACME | 34.9 | ||
| 2.5" | 63.6 | 68.8 | 77.67×8TPIACME | 38.1 | ||
| 3.0" | 76.3 | 81.9 | 91.19×8TPIACME | 41.3 | ||
| 4.0" | 101.7 | 108.1 | 119.25×6TPIACME | 41.3 | ||
Address
No.729, Road 3, Binhai Industrial Zone, Wenzhou, Zhejiang, China
Tel
