Vulkan F20/2 300 Effect Oxygen cylinder pressure reducer DIN 477-5, 0 - 20 bar according to ISO 2503, Class 5, two-stage design, first stage with metal diaphragm, with pre-pressure compensation for constant back pressure with falling back pressure, with safety gauges according to ISO 5171, with shut-off valve. Maximum inlet pressure: 300 bar. Output pressure: 0 - 20 bar adjustable. Maximum output: 60 Nm³/h air at 20 bar back pressure. Inlet: W 30x2 RH U-nut according to DIN 477-5 No. 59. Outlet: G 1/4 RHk x 6mm nozzle according to EN 560. Inlet gauge: 0 - 400/300 bar. Outlet gauge: 0 - 40/20 bar. Width x Height x Depth: 240 x 210 x 75 mm. Important note for 300 bar. Pressure reducers - Please check your cylinder connection! Cylinder pressure reducers for 300 bar have a manual connection according to DIN 477 Part 5 and are NOT backward compatible. This means they do NOT fit cylinders with a maximum filling pressure of 200 bar! If necessary, see our following tutorial, 3: Difference between 200 bar and 300 bar pressure reducers. This cylinder pressure reducer is available in the following versions, among others: Gas purity/diaphragm: Standard: - for technical gases up to a gas purity of 4.5 with standard membrane Optional (surcharge): - for pure gases up to a gas purity of 5.0 with stainless steel membrane SS321 (1.4541) Special outlet screw connection: Standard: - hose nozzle G1/4" RHk x 6mm Options (surcharge): Item number Gas purity Outlet connection 308230 for technical gases up to 4.5, with standard membrane Hose nozzle G1/4" RHk x 6mm 308230-812 for technical gases up to 4.5, with standard membrane Hose nozzle G3/8" RHk x 9mm 308230-800 for technical gases up to 4.5, with standard membrane External thread G1/4" RHk according to EN560 308230-870 for technical gases up to 4.5, with standard membrane, external thread G3/8" RHk according to EN 560 308230-838 for technical gases up to 4.5, with standard membrane, external thread G1/2" RHk according to EN 560 308230-6M for technical gases up to 4.5, with standard membrane, compression fitting VA 6mm 308230-8M for technical gases up to 4.5, with standard membrane, compression fitting VA 8mm 308230-10M for technical gases up to 4.5, with standard membrane, compression fitting VA 10mm 308230-12M for technical gases up to 4.5, with standard membrane, compression fitting VA 12mm 308230-2 for technical gases up to 4.5, with standard membrane Compression fitting VA 1/8" 308230-4 for technical gases up to 4.5, with standard membrane Compression fitting VA 1/4" 308230-MM for pure gases up to 5.0, with metal membrane SS321 (1.4541) Hose nozzle G1/4" RHk x 6mm 308230-MM-812 for pure gases up to 5.0, with metal membrane SS321 (1.4541) Hose nozzle G3/8" RHk x 9mm 308230-MM-800 for pure gases up to 5.0, with metal membrane SS321 (1.4541) external thread G1/4" RHk according to EN560 308230-MM-870 for pure gases up to 5.0, with metal membrane SS321 (1.4541) external thread G3/8" RHk according to EN 560 308230-MM-838 for pure gases up to 5.0, with metal membrane SS321 (1.4541) external thread G1/2" RHk according to EN 560 308230-MM-6M ​​for pure gases up to 5.0, with metal membrane SS321 (1.4541) compression fitting VA 6mm 308230-MM-8M for pure gases up to 5.0, with metal membrane SS321 (1.4541) compression fitting VA 8mm 308230-MM-10M for pure gases up to 5.0, with metal membrane SS321 (1.4541) compression fitting VA 10mm 308230-MM-12M for pure gases up to 5.0, with metal membrane SS321 (1.4541) compression fitting VA 12mm 308230-MM-2 for pure gases up to 5.0, with metal membrane SS321 (1.4541) compression fitting VA 1/8" 308230-MM-4 for pure gases up to 5.0, with metal membrane SS321 (1.4541) compression fitting VA 1/4"