Platinum CONV-800A Vacuum Converter – Push-Button Vacuum Fill Ink Converter for Platinum Fountain Pens

Platinum CONV-800A Vacuum Converter – Push-Button Vacuum Fill | High-Capacity Ink Converter for Platinum Fountain Pens

Fill faster. Carry more ink. Write longer. The Platinum CONV-800A Vacuum Converter is the high-performance alternative to the standard piston converter — using a push-button vacuum mechanism that draws a full charge of ink into the chamber in a single, satisfying stroke. No twisting. No multiple turns. Just press, submerge, release — and you’re fully loaded. The CONV-800A is an official Platinum Pen Co. component, engineered for direct compatibility with Platinum fountain pens and designed to hold a generous ink capacity for writers who don’t want to stop mid-session to refill.

One press. Maximum ink. Ready to write.

✒️ Product Highlights

• Brand: Platinum (Japan)
• Model: CONV-800A
• Type: Vacuum converter — push-button single-stroke filling mechanism
• Compatibility: Designed for Platinum fountain pens that accept standard Platinum cartridges/converters
• Ink compatibility: Works with all bottled fountain pen inks — Platinum, Iroshizuku, Diamine, Pilot, Sailor, Waterman, and more
• Capacity: Higher ink capacity than standard piston converters — designed for extended writing between fills
• Filling speed: Single-stroke fill — faster than multi-turn piston converters
• Material: Precision-engineered components — durable vacuum seal, smooth button action
• Origin: Made in Japan — official Platinum OEM component
• Ideal for: Heavy writers, ink enthusiasts, journalists, students, anyone who prefers fewer interruptions and more ink on hand

🔄 Vacuum Fill vs. Piston Fill – What’s the Difference?

A standard piston converter (like the Platinum PQR-200) fills ink by rotating a screw mechanism through multiple turns — reliable and controlled, but slower. The CONV-800A vacuum converter works differently: pressing the button compresses a spring-loaded vacuum chamber; submerging the nib and releasing the button creates a rapid vacuum that draws ink into the chamber in a single stroke. The result is a faster fill, a larger ink load, and a mechanism that many writers find more intuitive and satisfying in practice. If you frequently use your pen for long writing sessions or switch inks regularly, the CONV-800A’s speed and capacity make it the superior choice.

📍 How to Fill the CONV-800A

1. Remove any existing cartridge or converter from your Platinum pen.
2. Insert the CONV-800A firmly into the pen’s section until it seats securely.
3. Press the push-button on the end of the converter fully down to compress the vacuum chamber.
4. Submerge the pen nib completely into your chosen bottled ink — ensure the nib is fully immersed.
5. Release the button slowly and steadily — the vacuum will draw ink rapidly into the chamber.
6. Remove the nib from the ink bottle and wipe the nib and grip section clean with a soft cloth.
7. Your pen is fully loaded and ready to write.

📦 What’s in the Box

• 1 × Platinum CONV-800A Vacuum Converter

❓ Frequently Asked Questions

Q: Which Platinum pens is the CONV-800A compatible with?

A: The CONV-800A is compatible with Platinum fountain pens that accept the standard Platinum cartridge/converter fitting — including the Platinum Century 3776, Balance, Prefounte, Cool, and many other models. If your Platinum pen accepts a standard Platinum cartridge, it should accept the CONV-800A. Always verify your pen’s converter compatibility before purchasing, or contact us if you are unsure.

Q: How is the CONV-800A different from the PQR-200 piston converter?

A: The PQR-200 uses a rotary piston mechanism — you twist a knob to draw ink gradually through multiple turns. The CONV-800A uses a push-button vacuum mechanism — a single press-and-release stroke draws the full ink charge instantly. The CONV-800A is generally faster to fill and holds a slightly higher ink volume. Both are official Platinum components; the best choice depends on your preference for filling style and ink capacity.

Q: Can I use non-Platinum bottled inks with this converter?

A: Yes. The CONV-800A is compatible with any standard bottled fountain pen ink from any manufacturer — including Pilot Iroshizuku, Diamine, Sailor, Waterman, Private Reserve, Noodler’s, and others. We recommend thoroughly flushing the converter with clean water before switching between ink types or brands.

Q: How do I clean the CONV-800A?

A: To clean, fill the converter with clean lukewarm water using the push-button mechanism and expel it repeatedly until the water runs clear. For a deeper clean, you can remove the converter from the pen and flush it under a gentle stream of lukewarm water. Do not use hot water, alcohol, or chemical cleaning agents, which may damage the internal vacuum seal.

Q: What if the vacuum seal weakens over time?

A: With regular use and proper cleaning, the CONV-800A vacuum seal is designed to last for years. If the button action becomes less effective over time, ensure the converter is clean and free of dried ink deposits around the seal. A small amount of silicone grease on the plunger seal can restore performance. Replacement converters are inexpensive if needed.

Q: How much ink does the CONV-800A hold compared to a standard cartridge?

A: The CONV-800A holds more ink than a standard short Platinum cartridge and is comparable to or exceeds a standard piston converter in capacity. Exact volume varies slightly by pen model due to internal section geometry, but the single-stroke fill consistently delivers a generous charge of ink.

Q: Is this an official Platinum product?

A: Yes. The Platinum CONV-800A is an official OEM component manufactured by Platinum Pen Co., Ltd. (Japan) — not a third-party or aftermarket product. It meets Platinum’s quality standards and is fully engineered for use with their fountain pen range.

Q: Will this converter fit pens from other brands such as Pilot or Sailor?

A: No. The CONV-800A uses Platinum’s proprietary fitting dimensions and is designed exclusively for Platinum fountain pens. Pens from other brands (Pilot, Sailor, Lamy, Pelikan, etc.) use different converter standards and require their own brand-specific converters. Please verify compatibility with your specific pen before purchasing.