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Overview
The SP45F number lock balance valves are precision-engineered regulators for achieving hydraulic equilibrium in centralized heating, HVAC, and other water systems. Featuring integrated flow indication and digital locking mechanisms, these valves enable technicians to precisely set and mechanically lock flow rates or pressure differentials in each circuit. The SP15F utilizes flange connections for water supply systems, while the SP45F employs threaded connections for return water systems or smaller-diameter pipelines. Their core function is to eliminate thermal imbalances and ensure flow distribution according to design specifications, serving as critical components for energy-efficient and high-performance system operation.

Feature
1. Digital Locking and Scale Indication: The valve features a digital opening locking mechanism and clear scale markings for indicating valve position. After adjustment, the locking device secures the valve stem position, effectively preventing preset value changes caused by vibration or misoperation, ensuring long-term balanced stability of the system.
2. Specialized measurement interface and debugging function: The valve body features a standard measurement interface, enabling the use of dedicated smart instruments to quickly measure and display real-time parameters such as flow rate and pressure difference without interrupting system operation. This significantly simplifies both initial system debugging and subsequent inspection and maintenance tasks.
3. Exceptional linear regulation and wide adjustment range: The valve core features a scientifically designed flow characteristic curve (e.g., linear or equal percentage), enabling a broad adjustment range. It ensures smooth and precise regulation across the entire flow range from minimum to maximum, meeting the need for fine control under varying loads.
4. Excellent shut-off performance and low flow resistance: The valve ensures reliable sealing when fully closed, making it suitable as a loop shut-off valve. When fully open, the optimized flow path minimizes flow resistance, reducing unnecessary system energy consumption.
5. High-reliability design: The valve stem features anti-rotation construction to prevent seal wear, while the packing structure ensures reliable performance with zero leakage.

SP45F number lock balance valve Structure Diagram
Performance Specification Sheet
| Performance Specification Sheet | ||||
| Nominal Pressure | 1.0 | 1.6 | 2.5 | MPa |
| Strength test pressure | 1.5 | 2.4 | 3.8 | |
| Sealing test pressure | 1.1 | 1.76 | 2.8 | |
| Applicable Temperature | 0~120 | ℃ | ||
List of Component Names and Materials
| part name | body, cover | stem | disc | sealing gasket |
| Material | cast iron, ductile iron, stainless steel | stainless steel | ductile cast iron | rubber asbestos board |
Standard requirements for external dimensions
1. The structural length of the valve shall comply with the standard of GB/T12221
2. Connecting flanges according to GB/T17241.6 standard

SP45F number lock balance valve Outline Diagram
Outline dimension table
| DN(mm) | L | H |
| 15 | 100 | 128 |
| 20 | 115 | 128 |
| 25 | 125 | 130 |
| 32 | 180 | 230 |
| 40 | 200 | 242 |
| 50 | 230 | 250 |
| 65 | 290 | 260 |
| 80 | 310 | 329 |
| 100 | 350 | 340 |
| 125 | 400 | 424 |
| 150 | 480 | 454 |
| 200 | 550 | 517 |
| 250 | 622 | 573 |
| 350 | 787 | 705 |

Model:
SP15F-10T/SP15F-16T/SP15F-25TSpecification:
DN50-DN300Pressure:
PN10~25Material:
Copper
Model:
ZYC-10/ZYC-16/ZYC-10Q/ZYC-16Q/ZYC-25Q/ZYC-10P/ZYC-16P/ZYC-25PSpecification:
DN15-DN350Pressure:
PN10~PN16Material:
cast iron, ductile iron, stainless steel
Model:
SP15-10T/SP15-16T/SP15-25TSpecification:
DN15-DN40Pressure:
PN10~25Material:
Brass