The SK741X flanged pressure control valve automatically maintains consistent downstream pressure in water supply systems. Its reliable pilot-operated design minimizes water hammer, prevents pipe damage, and ensures long-term continuous operation for municipal and infrastructure applications.

Figure 1 Structure Diagram

1-Valve Body                                               2-Lower Control Chamber     

3-Upper Control Chamber                         4-Diaphragm

5- Opening Indicator                                  6-Pilot Valve Assembly

7-Closure Member

Engineering Standards & Compliance

• Flange Dimensions: Engineered to align with GB/T 17241.1-2024 connection guidelines.

• Pressure & Leakage Verification: Undergoes rigorous structural integrity and seat tightness testing according to GB/T 13927-2022 specifications.

• Data Reference: Comprehensive performance ratings are detailed in Table 1, core material selections in Table 2, and physical outer dimensions in Table 3.

Core Highlights

• Corrosion-Resistant Ductile Body: Cast from high-grade ductile iron with a protective epoxy finish, ensuring long-term durability in liquid distribution lines.

• Self-Powered Hydraulic Control: Driven by internal system pressure through a pilot-diaphragm setup—eliminates the need for outside electrical or pneumatic power sources.

• Dual Protection Capability: Performs both pressure relief and back-pressure maintenance tasks within a single safety unit.

• Fast Surge Mitigation: Instantly actuates when line pressure surpasses designated safety limits to shed transient peak surges.

• Field-Adjustable Interface: Outfitted with fine-tuning needle controls and integrated pressure gauges for straightforward on-site calibration.

• Low-Friction Flow Path: Streamlined internal passage lowers head loss while ensuring quiet, cushioned shut-off to dampen shock waves.

• Integrated Line Strainer: Includes an inline filter in the pilot circuit to stop debris from fouling control orifices.

• In-Line Serviceability: Standard flanged connections allow internal maintenance and component inspection without pulling the housing off the main line.

Ideal Applications

• Municipal pump stations and booster facilities

• High-rise residential headers and fire-protection supply loops

• Water treatment plants and industrial process networks

• Closed-loop cooling and utility distribution piping

• Pressure surge relief for high-volume pumping equipment

• Hydraulic shock mitigation during pump startup, shutdown, or power loss events

Precision Valve Manufacturing

Professional Valve Manufacturer | Integrated Manufacturing

Raw Material

We select high-quality raw materials according to product specifications and international standards. All incoming materials are carefully inspected to ensure chemical composition, mechanical properties and traceability.

Forging & Casting

Advanced forging and casting processes are used to produce strong and reliable valve bodies and components. Strict process control ensures uniform structure, dimensional accuracy and excellent mechanical performance.

CNC Machining

Our CNC machining equipment provides precise and consistent processing of valve components. Critical dimensions, threads and sealing surfaces are strictly controlled to ensure accurate assembly and reliable sealing performance.

Shot Blasting & Coating

Valve surfaces are professionally shot blasted to remove rust, scale and impurities. Protective coatings are then applied according to customer requirements, providing excellent corrosion resistance and a durable surface finish.

Pressure Testing

Every valve undergoes strict pressure testing before shipment. Body and seat tests are performed according to applicable standards and customer specifications to verify pressure resistance and sealing reliability.

Quality Inspection

Our quality control team conducts comprehensive inspections throughout the production process. Finished valves are checked for dimensions, appearance, materials, pressure performance and overall quality before final approval and shipment.