Gas pressure regulator YQJ (F) series

diaphragmbrassstainless steel 316L

Product features

• Constructed in brass (YQJ series) for non-corrosive gases.
• Constructed in 316L stainless steel (YQJF series) for corrosive gases.
• Metal diaphragm used in the valve to avoid secondary contamination of high-purity gases from rubber diaphragms.
• High-pressure resistant design with excellent sealing performance.
• Compact structure with multi-channel filters; durable, easy to service and to switch between different gases.

External dimensions
Packaging size: 205 x 175 x 145 mm

Technical parameters

• Pressure stabilization: Gas source pressure 5–15 MPa. For each 1 MPa change of inlet pressure, the outlet pressure changes by no more than 7 × 10^-3 MPa.
• Flow characteristic: When inlet pressure is above 2 MPa, regulate flow within the nominal range. Outlet pressure change should not exceed ±6% of the full scale of the outlet pressure gauge.
• Internal and external leak rate: < 5 × 10^-9 Pa·m^3/s.
• Max. inlet pressure: 15 MPa.
• Outlet pressure options: 0.45 / 0.12 / 0.75 / 1.5 MPa.

Flow characteristic curve
The product documentation includes a graphical flow characteristic curve showing the pressure/flow behavior.

Model selection guide
The product documentation contains a graphical model selection guide to help choose the appropriate regulator model.

Selection aid
Additional selection diagrams are provided in the product documentation to illustrate connection and configuration options.

Technical characteristics / specifications

• Series: YQJ (non-corrosive, brass) and YQJF (corrosive, 316L stainless).
• Diaphragm: Metal diaphragm (prevents contamination in high-purity gas applications).
• Inlet pressure range: up to 15 MPa (max. inlet pressure 15 MPa).
• Outlet pressure options: 0.45 MPa, 0.12 MPa, 0.75 MPa, 1.5 MPa.
• Pressure stability: ≤ 7 × 10^-3 MPa outlet change per 1 MPa inlet change (inlet 5–15 MPa).
• Flow regulation: For inlet pressure > 2 MPa within nominal range; outlet deviation ≤ ±6% of gauge full scale.
• Leak rate (internal/external): < 5 × 10^-9 Pa·m^3/s.
• Construction: High-pressure resistant, compact, with multi-channel filters; suitable for laboratory analysis, petrochemical industry, gas supply industry and standard gas mixtures.