Overview
The Richards Industries HM591U3331413 (model 56522) is a premium stainless steel hex valve engineered for high-pressure industrial environments. With a certified pressure rating between 3525 and 3980 PSIG, this four-port valve delivers reliable fluid and gas control in demanding applications across pharmaceutical, chemical, petrochemical, and food processing industries.
Key Features
- High-pressure rating: 3525–3980 PSIG
- Four-port design for flexible installation and flow configuration
- Stainless steel construction for corrosion resistance and durability
- Precision-engineered for accurate fluid control and repeatability
- Compact hex body format for space-constrained manifold assemblies
Technical Specifications
| Manufacturer | Richards Industries / Hex Valve |
| Model Number | HM591U3331413 |
| Designation | 56522 |
| Pressure Rating | 3525–3980 PSIG |
| Body Material | Stainless Steel |
| Port Configuration | Four ports |
| Application Type | Instrument hand valve / manifold |
Typical Applications
- High-pressure fluid and gas sampling systems
- Pressure gauge manifolds and isolation blocks
- Laboratory and pilot plant test equipment
- Instrumentation and analytical systems
- Pharmaceutical and biotech process control
- Chemical and petrochemical pilot plants
Compatibility & Replacements
Compatible With
- High-pressure process instrumentation systems
- Gauge isolation and protection manifolds
- Laboratory and pilot-scale reactors
- Stainless steel fluid sampling assemblies
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. This model may be directly interchangeable with other Richards Industries / Hex Valve four-port stainless steel manifold valves of equivalent pressure rating.
Works With
- High-pressure gauge systems (up to 3980 PSIG)
- Stainless steel tubing and fittings (standard industrial sizes)
- Pressure transducers and sensors rated for 3525+ PSIG
- Laboratory process automation and control systems




















