Top-Flo® BioPro® Forged Diaphragm Valve (74L3)
- Sanitary Tri-Clamp Diaphragm Valve
- Manufactured from ASTM A182 GR F316L
- 20RA ID (SF1)
- Meets Bioprocessing Equipment (BPE) Standards
- BPE 2019 0.005-0.017 with 3.1 Material Certification
- Autoclavable FKM O-ring sealed 304SS stainless steel manual bonnet
- PPS Thermoplastic Handwheel
- This Product Normally Ships in 1 – 2 Days
- Replacement Bayonets Available
- View Sizes and Dimensions
Sanitary tri-clamp diaphragm valve plug valves for high purity process piping applications
Combining world-class industry experience with engineering and manufacturing facilities located in both the USA and Canada. Our R&D, engineering, and manufacturing groups are committed to providing high-quality valves that are unsurpassed by any of our competitors. Learn more about Diaphragm Valves.
Diaphragm Valve Part Numbers & Dimensions
| Part Number | Sanitary Size | Material | A Clamp End | D Center To Top | Drain Angle |
|---|---|---|---|---|---|
| 74L3-12-1K-50-20RA-316L | 1/2" | Teflon | 3.50" | 3.27" | 30° |
| 74L3-12-2E-50-20RA-316L | 1/2" | EPDM | 3.50" | 3.27" | 30° |
| 74L3-12-1K-75-20RA-316L | 3/4" | Teflon | 4.00" | 3.66" | 25° |
| 74L3-12-2E-75-20RA-316L | 3/4" | EPDM | 4.00" | 3.66" | 25° |
| 74L3-12-1K-10-20RA-316L | 1" | Teflon | 4.50" | 4.17" | 28° |
| 74L3-12-2E-10-20RA-316L | 1" | EPDM | 4.50" | 4.17" | 28° |
| 74L3-12-1K-15-20RA-316L | 1-1/2" | Teflon | 5.50" | 6.10" | 20° |
| 74L3-12-2E-15-20RA-316L | 1-1/2" | EPDM | 5.50" | 6.10" | 20° |
| 74L3-12-1K-20-20RA-316L | 2" | Teflon | 6.25" | 7.07" | 20° |
| 74L3-12-2E-20-20RA-316L | 2" | EPDM | 6.25" | 7.07" | 20° |
How Does a Diaphragm Valve Work?
The diaphragm valve opens and closes via a turn handle which is connected to a plunger. The plunger applies pressure to the diaphragm which then flexes up or down to control flow. Turning the handle clockwise will lower the diaphragm causing flow to decrease while turning the handle counterclockwise raises the diaphragm increasing product flow through the valve.
Additional information
Line Drawings
| SKU | Description | Line Drawing |
|---|---|---|
| 74L3-09-1K-25-20RA-316L | 2 1/2″ Tri-Clamp Diaphragm Valve, FDA/USP MPTFE/EPDM, 20Ra (SF1) |
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| 74L3-09-1K-30-20RA-316L | 3″ Tri-Clamp Diaphragm Valve, FDA/USP MPTFE/EPDM, 20Ra (SF1) |
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| 74L3-09-2E-25-20RA-316L | 2 1/2″ Tri-Clamp Diaphragm Valve, FDA/USP EPDM, 20Ra (SF1) |
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| 74L3-09-2E-30-20RA-316L | 3″ Tri-Clamp Diaphragm Valve, FDA/USP EPDM, 20Ra (SF1) |
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| 74L3-12-1K-10-20RA-316L | 1″ Tri-Clamp Diaphragm Valve, FDA/USP MPTFE/EPDM, 20Ra (SF1) |
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| 74L3-12-1K-15-20RA-316L | 1 1/2″ Tri-Clamp Diaphragm Valve, FDA/USP MPTFE/EPDM, 20Ra (SF1) |
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| 74L3-12-1K-20-20RA-316L | 2″ Tri-Clamp Diaphragm Valve, FDA/USP MPTFE/EPDM, 20Ra (SF1) |
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| 74L3-12-1K-50-20RA-316L | 1/2″ Tri-Clamp Diaphragm Valve, FDA/USP MPTFE/EPDM, 20Ra (SF1) |
Request Line Drawing |
| 74L3-12-1K-75-20RA-316L | 3/4″ Tri-Clamp Diaphragm Valve, FDA/USP MPTFE/EPDM, 20Ra (SF1) |
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| 74L3-12-2E-10-20RA-316L | 1″ Tri-Clamp Diaphragm Valve, FDA/USP EPDM, 20Ra (SF1) |
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| 74L3-12-2E-15-20RA-316L | 1 1/2″ Tri-Clamp Diaphragm Valve, FDA/USP EPDM, 20Ra (SF1) |
Request Line Drawing |
| 74L3-12-2E-20-20RA-316L | 2″ Tri-Clamp Diaphragm Valve, FDA/USP EPDM, 20Ra (SF1) |
Request Line Drawing |
| 74L3-12-2E-50-20RA-316L | 1/2″ Tri-Clamp Diaphragm Valve, FDA/USP EPDM, 20Ra (SF1) |
Request Line Drawing |
| 74L3-12-2E-75-20RA-316L | 3/4″ Tri-Clamp Diaphragm Valve, FDA/USP EPDM, 20Ra (SF1) |
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Can manually operated 3" O.D. Diaphragm Valves be installed in the vertical? does it affect operation/sealing?
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Q Can manually operated 3" O.D. Diaphragm Valves be installed in the vertical? does it affect opera...... Read moreA Diaphragm valves can be installed either horizontally or vertically without affecting operation or sealing.
