Yean Hern Enterprise, Inc. specializes in manufacturing and exporting overseas. Their product lines include: Quick Coupling, Pipe/ Tube/ Hose, Tube Fitting, Instrument Ball Valves/ Valve Manifolds/ Needle Valves/ Check Valves, Pressure Reducing Regulators, Pneumatic and Hydraulic Parts as well as Accessories. (read more)

Pilot-Operated Regulators are higher in capacity and more accurate than standard self-operated regulators. Pilot-Operated Regulators will maintain constant set outlet pressure even when inlet pressure fluctuations or variations in flow occur. (read more)

The 455 Series Externally-Sensed Pressure Regulating Valves are used for reducing pressure in steam, air, and water systems. Commonly used in heating and other process applications. (read more)

• Excellent sensitivity
• Self-venting
• Extremely reliable
• Spring, dome or air ratio loading

• Ideal purge regulator
• High pressure inlet version incorporates a balanced main valve to minimize inlet pressure fluctuation

• Semiconductor grade pressure reducing regulator
• Available with inlet pressures up to 3,000 psi
• High flow applications
• Several outlet pressure ranges up to 150 psi
• 10 or 5 Ra internal surface finish
• Tube stubs or metal face seal type connections

• Semiconductor grade pressure reducing regulator
• Available in two inlet pressure versions, 600 psi and 3,500 psi
• Several outlet pressure ranges up to 500 psi
• Low flow applications
• Tube stubs or metal face seal type connections

• Product of choice for state-of-the-art OEM gas systems
• 10 Ra or 5 Ra microinch surface finish
• Available in VCR, tube stubs or surface mount, "C" or "W" seal

• High flow capacity (Cv = 3.3)
• Diaphragm sensed - highly sensitive
• Modular construction - easy service
• External sensing available for improved accuracy

• FDA Title 21 & USP Class VI Material
• Gas and clean steam versions
• Tracking version for agitator seals
• Gas flows to 50 SCFM N₂