The paper industry is an important basic industry of the national economy, closely related to people's daily lives. From cultural paper to packaging paper, from household paper to specialty paper, paper production is a complex systematic project involving multiple process links such as pulping, papermaking, and alkali recovery. In each process, valve actuators play an important role — they precisely control the on-off and regulation of pulp, chemicals, steam, and white water, ensuring the stable operation of paper production.

With years of experience in R&D and manufacturing of valve actuators, Yangzhou Hengchun Electronics Co., Ltd. has launched a series of special actuator products for the paper industry, targeting the special working conditions of moisture, corrosion, and slurry wear in the paper industry. These products are widely used in multiple process links such as pulping, papermaking, and alkali recovery, providing reliable power support for efficient production in the paper industry.

Full Process Coverage: From Pulping to Papermaking, Reliable Operation at Every Process Link

Paper production processes are complex. From the moment raw materials enter the workshop, they go through multiple processes such as pulping, papermaking, and post-processing before finally becoming finished paper. Every process is inseparable from the precise control of valve actuators. With excellent performance and wide adaptability, Hengchun actuators can meet the application needs of full process and full technology in the paper industry:

 Pulping Section Applications

Stock Preparation System

· Wood chip/waste paper conveying system valves

· Hydrapulper inlet/outlet valves

· High-consistency cleaner supporting valves

· Screening and purification system valves

Cooking System

· Digester feed valves

· Cooking liquor (white liquor, black liquor) conveying valves

· Cooking temperature and pressure control valves

· Blow valves

· Continuous digester supporting valves

· Liquor circulation system valves

Washing & Screening System

· Vacuum washer supporting valves

· Pressure screen inlet/outlet valves

· Accepts and rejects conveying valves

· Black liquor extraction system valves

· Pulp consistency control valves

· Pulp flow control valves

Bleaching System

· Oxygen delignification system valves

· Chlorine dioxide bleaching system valves

· Hydrogen peroxide bleaching system valves

· Hypochlorite bleaching system valves

· Bleaching tower inlet/outlet valves

· Post-bleaching washing system valves

· Chemical preparation and dosing system valves

Beating/Refining System

· Refiner inlet/outlet valves

· Beater circulation valves

· Pulp consistency control valves

· Beating degree control related valves

· Stock chest inlet/outlet valves

Papermaking Section Applications

Stock Preparation System

· Various stock (long fiber, short fiber, filler, etc.) proportioning valves

· Stock chest inlet/outlet valves

· Stock pump inlet/outlet valves

· Consistency control valves

· Flow control valves

Chemical Addition System

· Sizing agent dosing system valves

· Retention aid dosing system valves

· Dye dosing system valves

· Brightener dosing system valves

· Filler (calcium carbonate, talc, etc.) dosing system valves

· Various additive storage tank inlet/outlet valves

Approach Flow System

· Fan pump inlet/outlet valves

· Pressure screen inlet/outlet valves

· Deaeration system valves

· Headbox pressure control valves

· Headbox consistency control valves

· White water circulation system valves

Wet End

· Forming fabric high-pressure cleaning water valves

· Vacuum system valves

· Wet end dewatering elements supporting valves

· Couch roll, transfer roll supporting valves

· Broke handling system valves

Press Section

· Press roll hydraulic system valves

· Felt cleaning water valves

· Vacuum system valves

· Press section dewatering system valves

· Sheet threading system valves

Dryer Section

· Dryer cylinder steam inlet valves

· Steam pressure control valves

· Temperature control valves

· Condensate discharge valves (steam traps)

· Dryer section grouped steam valves

· Hood ventilation system valves

Calendering & Reeling

· Calender hydraulic system valves

· Reeler supporting valves

· Calender roll cooling system valves

· Finishing system valves

Alkali Recovery/Black Liquor Treatment Applications

Black Liquor Evaporation System

· Black liquor conveying valves

· Evaporator inlet/outlet valves

· Steam heating valves

· Condensate valves

· Black liquor consistency control valves

· Non-condensable gas discharge valves

Black Liquor Combustion System (Recovery Boiler)

· Black liquor gun valves

· Combustion air system valves

· Primary air, secondary air control valves

· Flue gas system valves

· Boiler feed water system valves

· Main steam system valves

· Furnace bottom smelt discharge valves

Green Liquor Causticizing System

· Green liquor conveying valves

· Lime dosing system valves

· Slaker supporting valves

· Causticizer supporting valves

· White liquor filtration system valves

· White liquor storage and conveying valves

· Green mud, white mud treatment system valves

White Liquor Recovery System

· White liquor conveying valves

· White liquor storage tank inlet/outlet valves

· White liquor filtration system valves

· Lime recovery system valves

White Water Recovery & Wastewater Treatment Applications

White Water Recovery System

· Disc filter supporting valves

· Flotation recovery system valves

· White water tower inlet/outlet valves

· White water reuse conveying valves

· High-efficiency shallow air flotation system valves

Wastewater Treatment System

· Equalization tank, homogenization tank valves

· Biochemical treatment system valves

· Sedimentation tank sludge discharge valves

· Filtration system valves

· Disinfection system valves

· Sludge treatment system valves

· Dosing system valves

Utility & Auxiliary Systems

· Steam system: steam main and branch pipe valves, pressure reducing control valves, steam traps, steam manifold valves

· Circulating water system: circulating pump inlet/outlet valves, cooling tower distribution valves, pressure control valves

· Compressed air system: compressor inlet/outlet valves, pressure control valves, drying system valves

· Vacuum system: vacuum pump inlet/outlet valves, vacuum pipeline valves, vacuum control valves

· Chemical preparation system: various chemical dissolution, dilution, conveying valves

· Fire protection system: fire water system valves, foam extinguishing system valves

· Ventilation & HVAC system: workshop ventilation, HVAC system valves

�� Compatible Valve Types

Hengchun actuators can be adapted to various types of valves commonly used in the paper industry:

· Ball valves (V-port ball valves, eccentric hemispherical valves, etc.), gate valves, knife gate valves/slurry valves, butterfly valves, globe valves, check valves, control valves, diaphragm valves, pinch valves, etc.

· Multi-turn, part-turn, linear stroke, and other drive forms

· On-off type, regulating type, intelligent type, and other functional configurations

· Standard type, anti-corrosion type, wear-resistant type, waterproof type, and other environmental adaptations

Designed for Paper Conditions: Wear-Resistant, Corrosion-Resistant, Stable & Reliable

The paper industry has special working conditions — humid and watery, chemical corrosion, slurry wear, fiber clogging... each condition is a severe test for equipment. Targeting the special working conditions of the paper industry, Hengchun Electronics has carried out special optimization design for its products:

Corrosion & Wear Resistant, Coping with Harsh Paper Environments

· Anti-Corrosion Products: For corrosive media such as black liquor, white liquor, and bleaching chemicals, anti-corrosion actuators are provided with special anti-corrosion coating on the shell, adapting to corrosive environments

· Wear-Resistant Design: For media containing fibers and particles such as pulp and white water, used with wear-resistant valves, the actuator provides stable output and meets the wear resistance requirements of frequent opening and closing

· Anti-Clogging Adaptation: For the characteristic that pulp is easy to clog, can be adapted to anti-clogging valves such as knife gate valves and V-port ball valves, providing reliable driving power

High Protection Grade, Adapting to Humid Environments

· IP67/IP68 Protection Grade: High-standard sealing design, adaptable to the humid, watery, and dusty environment of paper workshops, effectively preventing water vapor and moisture from entering the equipment interior

· Waterproof Design: For areas with water splash such as the wet end and press section, high waterproof grade actuators are provided to ensure stable equipment operation

· Anti-Condensation Design: For environments with large temperature differences and easy condensation, special anti-condensation design has been carried out to avoid internal condensation affecting electrical components

Precise Control, Meeting Process Requirements

· High-Precision Regulation: High-precision position feedback and control algorithms achieve accurate regulation of parameters such as pulp consistency, flow rate, and steam pressure, ensuring stable paper quality

· Fast Response: Fast action response speed, meeting the fast response requirements of process regulation and safety interlocking

· Stable & Reliable: Long-life design, core components undergo rigorous life testing, meeting the long-cycle operation requirements of continuous paper production

Intelligent Control, Empowering Smart Papermaking

· Remote Monitoring: Supports bus communication, can be connected to DCS/SCADA systems for remote monitoring and operation, meeting the automation and intelligent management needs of paper mills

· Fault Self-Diagnosis: Built-in intelligent diagnosis function, real-time monitoring of equipment operating status, early warning of potential faults, reducing unplanned shutdowns

· Data Collection: Can collect operating data, providing data support for production optimization and predictive maintenance

· Split Design: For special installation scenarios, split solutions are provided, with controllers installed in accessible positions for easy maintenance and debugging

Conclusion: With Reliable Quality, Empowering High-Quality Development of the Paper Industry

The paper industry is a traditional industry, but also an evergreen industry. With consumption upgrading and industrial transformation, the paper industry is developing toward high-end, intelligent, and green directions, putting forward higher requirements for the reliability and intelligence of production equipment.

Hengchun Electronics will continue to deepen its presence in the paper field, continuously optimize product performance, and continuously launch actuator products more adapted to paper conditions. With reliable quality and professional services, we will contribute to the efficient production and high-quality development of the paper industry.