**Download the Instruction Manual: Please Visit Our Website: www.zuoyuansmart.com**
**APPLICATION**
The SP21M Pressure Regulator is a direct-acting, internally-set pilot control pressure regulator designed for downstream pressure regulation. It can effectively control pressures ranging from 20 kPa to 900 kPa. The operating temperature range is from -48°C to 120°C, making it suitable for a wide variety of industrial applications.
**MODEL SELECTION**
Selecting the right model depends on your specific application requirements, including flow rate, pressure range, and environmental conditions. For detailed guidance, please refer to our product catalog or contact our technical support team.
**PRODUCT FEATURES**
- **Compact Structure**: The embedded spring design ensures a compact and well-protected construction, ideal for space-constrained installations.
- **Easy Pressure Regulation**: A screw adjustment mechanism allows for quick and precise pressure settings.
- **High Precision**: The fixed net difference spring action ensures minimal deviation in control pressure, delivering reliable and accurate performance even at high pressure levels.
- **Withstand Pressure Difference**: The balanced main valve plug enables the regulator to handle significant pressure differentials without compromising performance.
- **Soft Sealing Seal**: The soft-seal design provides a tight shut-off, ensuring minimal leakage and long service life.
- **Stable Control**: The independent setting regulator and main control valve ensure stable operation without interference.
- **Overload Safety**: The SP21M is engineered to safely withstand overloads up to several times the maximum rated pressure, protecting both the system and the regulator.
- **Integrated Pressure Gauge**: A standard pressure gauge is included for easy monitoring and commissioning.
- **Easy Maintenance**: Designed with user-friendly maintenance in mind, the top-mounted push-down installation allows for internal inspection without disassembly.
- **Universal Parts**: High part compatibility across the entire self-operated product series reduces spare parts inventory and simplifies repairs.
**PRESSURE SAMPLING POINT**
Proper placement of the pressure sampling point is essential for accurate regulation. Ensure it is located upstream of the valve, away from turbulence and flow disturbances.
**SPECIFICATION SERIES**
- **Body Size (Flanged Connection)**: DN20 (3/4"), DN40 (1½"), DN50 (2"), DN65 (2½"), DN80 (3"), DN100 (4"), DN150 (6"), DN200 (8")
- **Pressure Class**: PN16, PN40, PN64; ANSI 150LB, 300LB, 600LB (custom options available)
- **Operating Temperature**: -54.4°F (-48°C) to 248°F (120°C)
- **Flow Factor (Cv/Kv)**: Cv = 1.167 × Kv
**Valve Seat Diameter & Flow Coefficients**
| Valve Seat Diameter | 20 | 25 | 40 | 50 | 65 | 80 | 100 | 150 | 200 |
|---------------------|----|----|----|----|----|----|-----|-----|-----|
| Kv | 6.5|10 |25 |40 |65 |100|160 |320 |480 |
**Leakage Class**: VI (Soft-Sealing)
**Flow Characteristics**: L (Standard), EQ% (Special Customized)
**PRECISION & DIFFERENCE PRESSURE & SPRING RANGE & ACTUATOR CONFIGURATION**
Due to the extensive data available, please contact our sales team for detailed specifications tailored to your application.
**Note**: The theoretical precision indicates the expected pressure deviation under 10–50% travel and constant pressure difference. Actual performance may vary depending on real-world conditions such as pressure fluctuations and flow variations.
**DIMENSION**
For detailed dimensions and installation guidelines, refer to the accompanying drawing or contact our engineering department for assistance.
**Contact Us**
For more information, product selection, or technical support, visit [www.zuoyuansmart.com](http://www.zuoyuansmart.com) or reach out to our customer service team.
Di-tertiary Butyl Peroxide
Di-tertiary Butyl Peroxide is an organic compound consisting of a peroxide group bonded to two tert-butyl groups. It is one of the most stable organic peroxides, due to the tert-butyl groups being bulky. It is a colorless liquid.
DTBP can in principle be used in engines where oxyge is limited, since the molecule supplies both the oxidizer and the fuel
DTBP is an irritant to noses, and eyes and skin. It is also flammable, so it should be handled with care.
DTBP is a liquid dialkyl peroxide. It is an efficient initiator for polymerization of olefins and
acrylic resins, and a modification agent of PP degradation, insoluble in water, soluble in
organic solvents such as toluene, acetone, styrene, etc. Freeing point lower than -30℃.
Miscible in alcohol,esters,ethers,olefins and othe organic solvents Immiscible with water.
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Jiangxi Zhewei Material Technology Co.,Ltd , https://www.jxzwchem.com