Diaphragm valve type 604 PVDF

  Datasheet (PDF)

The Georg Fischer SYGEF Standard diaphragm valve type 604 d20 DN15 PVDF is an engineered pneumatic valve specifically configured for clean process distribution, aggressive chemical handling, and deionized water circuits. Featuring a compact, all-plastic construction completely devoid of external metal screws, the assembly eliminates external corrosion risks while maintaining uncompromising mechanical durability under harsh industrial atmospheres. The pneumatic actuator utilizes a threaded housing designed for straightforward maintenance access and rapid cycle response, enabling fast opening and closing times across Fail-Safe to Close (FC), Fail-Safe to Open (FO), and Double-Acting (DA) control schemes powered via standard G 1/4 inch pilot air ports. Operating at a nominal pressure rating of PN6 (6 bar), the valve delivers an optimized flow capacity with a kv-value of 125 liters per minute at a 1 bar pressure differential and an exact diaphragm lift stroke of 6 mm, minimizing turbulence and fluid shear. True union end connections with metric spigots facilitate rapid radial installation and inline disassembly without requiring mechanical modification of the adjoining pipeline. Manufactured from high-grade polyvinylidene fluoride, the valve body withstands continuous working media temperatures ranging from -20 degrees Celsius to +140 degrees Celsius, resisting concentrated acids, halogens, and chemical cleaning agents. Outfitted with high-integrity PTFE/EPDM, PTFE/FKM, or FKM diaphragm membranes backed by internal FKM sealing rings, the unit provides zero-leakage shut-off and reliable flow regulation across advanced chemical dosing systems.