Backflow protection · PFA-lined ball check valve
PFA-Lined Ball Check Valve Prohibron9
One moving part · flanged · DN 15 – 200 / NPS 1" – 8" · PN 16 / Class 150 · for corrosive and high-purity media
- Sizes
- DN 15 – 200 · NPS 1" – 8"
- Pressure
- Up to 10 bar · see P-T diagram
- Temperature
- −10 °C … +200 °C
- Directive
- Designed and manufactured to PED 2014/68/EU
Ball check valve with PFA-lined body: the ball lifts with forward flow and seats against reverse flow. No hinge, no external parts and no actuation — a simple check for dosing-pump discharges, small transfer lines and chemical injection. One page for both norms: choose the size (EN or ASME) and lining, and send the configuration as a request for quotation.
Features
Virgin PFA lining
Body lined with virgin PFA, transfer-moulded and mechanically anchored in the body; PFA/AS antistatic lining as the second option.
Suitable for vacuum service
PFA lining anchored in dovetail grooves in the body — suitable for vacuum service; limits per P-T diagram or on request.
One moving part
Centre-guided ball, no external actuation — low maintenance.
Vertical and horizontal installation
For uncomplicated installation in all environments; horizontal installation needs a minimum differential pressure of 1 bar.
Closes automatically, vertical
Installed vertically (up to 60°), the centre-guided ball closes the valve automatically.
Closes automatically, horizontal
Installed horizontally (90° to 60°), the valve closes if the backflow is 1.5 – 2.5 m/s (water based).
Leakage class D
Controlled and minimal leakage (<0.1 % of valve capacity).
Sight glass add-on
Quick visual check of media flow and valve operation without system disassembly.
Which version for which duty
| Duty | Choose |
|---|---|
| Dosing-pump discharges, chemical injection | Prohibron9, PFA lining |
| Small transfer lines | Prohibron9, DN 15 – 200 / NPS 1" – 8" |
| Media where electrostatic charge must be led off | PFA/AS (antistatic) lining |
| Vertical installation | Installation up to 60° — the ball closes the valve automatically |
| Horizontal line | Installation 90° to 60° — minimum 1 bar differential pressure; closes at 1.5 – 2.5 m/s backflow (water based) |
| Visual control of flow and valve function | Sight glass add-on — a FEP foil liner keeps the glass out of contact with the medium |
Configure and request a quote
Your configuration
Reference: PRO9-DN015-PFA
Technical data
| Type | Ball check valve (non-return), one moving part, no external actuation; vertical or horizontal installation |
|---|---|
| Sizes | DN 15 – 200 · NPS 1" – 8" |
| Pressure rating | Vacuum to 10 bar, according to pressure-temperature diagram |
| Vacuum | PFA lining anchored in dovetail grooves in the body — suitable for vacuum service; limits per P-T diagram or on request. |
| Temperature | −10 °C up to +200 °C — see P-T diagram |
| Flanges | EN 1092-1 (PN 16) · ASME B16.5 (Class 150, RF) |
| Face-to-face | EN 558-1 Series 1 |
| Body | 1.0619 or 1.4308 / 1.4408 / 1.4409 (A216 WCB, CF8 / CF8M / CF3M) |
| Lining | Virgin PFA, PFA/AS (antistatic) — FEP, PP, PVDF on request |
| Ball | PTFE, massive or hollow |
| Bolts, nuts and screws | A2/A4-70 stainless steel |
| Options | Sight glass add-on (FEP foil liner between glass and medium) |
| Testing | Every valve pressure-tested in Germany before shipment. Pressure test to DIN EN 12266-1: body 16 bar, back seat 2 bar, leakage rate D (other leakage rates on request); spark test on request; EN 10204 3.1 material certificates |
| Directive | Designed and manufactured to the Pressure Equipment Directive 2014/68/EU |
| Origin and quality | Made in Germany · country of origin Germany · ISO 9001:2015 certified manufacturing |
Materials
| Pos. | Part | Material |
|---|---|---|
| 1 | Body | 1.0619 , 1.4308, 1.4408/ A216WCB, CF8-M or CF-8 |
| 2 | Lining | PFA, PFA/AS, FEP, PVDF |
| 3 | Ball | PTFE massive or hollow |
| 5 | Bolts, Nuts and Screws | A2/A4-70 Stainless Steel |
| 6 | Nuts | A2/A4-70 Stainless Steel |
Wetted parts: lining (PFA or the selected lining material) and PTFE ball. Further lining materials on request.
Pressure–temperature rating
P-T-Diagram for Prohibron9 PFA Lined Ball Check Valve Lower limit −10 °C; vacuum limits per P-T diagram or on request.
Dimensions
EN version — EN 1092-1 PN 16, EN 558 Series 1 · mm
| Size | L | ØD | ØK | ØD1 | n × ød | Kv (DIN) / Cv (ASME)* |
|---|---|---|---|---|---|---|
| DN 15 | 130 | 95 | 65 | 45 | 4 x 14 (M12) | — |
| DN 25 | 160 | 115 | 85 | 68 | 4 x 14 (M12) | 27 |
| DN 40 | 200 | 150 | 110 | 88 | 4 x 18 (M16) | 97 |
| DN 50 | 230 | 165 | 125 | 102 | 4 x 18 (M16) | 122 |
| DN 80 | 310 | 200 | 160 | 138 | 8 x 18 (M16) | 300 |
| DN 100 | 350 | 220 | 180 | 158 | 8 x 18 (M16) | 410 |
| DN 150 | 480 | 285 | 240 | 212 | 8 x 22 (M20) | 360 |
| DN 200 | 600 | 340 | 295 | 268 | 12 x 22 (M20) | on request |
ASME version — ASME B16.5 Class 150 RF, ASME B16.10 · mm
| Size | L | ØD | ØK | ØD1 | n × ød | Kv (DIN) / Cv (ASME)* |
|---|---|---|---|---|---|---|
| NPS 1" | 160 | 108 | 79.4 | 50.8 | 4 x 15.9 | 31 |
| NPS 1½" | 200 | 127 | 98.4 | 73 | 4 x 15.9 | 113 |
| NPS 2" | 230 | 152.4 | 120.5 | 92.1 | 4 x 19 | 142 |
| NPS 3" | 310 | 190.5 | 152.5 | 127 | 4 x 19 | 348 |
| NPS 4" | 350 | 228.6 | 190.5 | 157.2 | 8 x 19 | 476 |
| NPS 6" | 394 | 279 | 241 | 216 | 8 x 22.2 | 418 |
| NPS 8" | 457 | 342.9 | 298.5 | 269.9 | 8 x 22.2 | 390 |
* Kv (DIN sizes) and Cv (ASME sizes) as listed; blank = not stated. Dimensions nominal — confirm against the certified drawing before piping design. The row of your selected size is highlighted; sizes without a row: dimensions on request.
Documents
Used in
Chemical processingFine chemicals & API manufacturingPharmaceutical & biopharmaPulp & paperMining & hydrometallurgyWater treatmentChemical storage & tank farms
FAQ
Questions we are often asked
PFA or PFA/AS lining?
PFA is the standard lining. PFA/AS is the antistatic version for media where electrostatic charge must be led off. FEP, PP and PVDF are available on request.
How do I install the Prohibron9?
Vertically (up to 60°) the centre-guided ball closes the valve automatically. Horizontally (90° to 60°) it closes if the backflow is 1.5 – 2.5 m/s (water based), and a minimum differential pressure of 1 bar is required.
Which size should I choose, DN or NPS?
Choose the size by the connection norm of your line: DN sizes have EN 1092-1 PN 16 flanges, NPS sizes ASME B16.5 Class 150 flanges. The dimension table lists both.
Can I see whether the valve is working?
Yes. A sight glass add-on enables a quick visual check of media flow and valve operation without system disassembly. A FEP foil liner keeps the glass out of contact with the medium. Mention the add-on in your request.
Which documents come with each valve?
Valves are tested to DIN EN 12266-1 and ship with EN 10204 3.1 material certificates. The Prohibron9 is designed and manufactured to the Pressure Equipment Directive 2014/68/EU.
PFA or PTFE lining — what is the difference?
Both are fully fluorinated plastics with almost universal chemical resistance. PTFE cannot be melted, so PTFE liners are pressed and sintered. PFA can be melted, so we transfer-mould it into the valve body: the lining is dense, anchored in the body and follows complex shapes. If your specification says "PTFE-lined", a PFA-lined valve meets the same chemical duty — ask us for a comparison for your medium.
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