AIX Boiler Bottom-Out Discharge Valve | Original Factory | Residue-Free Bottom Discharge Valve for Reactors | Industrial Customization

The bottom-out discharge valve is a special discharge valve designed for the bottom of reactors, storage tanks, distillation towers and other vessels. It adopts a Y-type straight-through valve body + bottom-out disc structure. When opening, the disc moves vertically downward and completely leaves the bottom flow channel, forming an unobstructed passage for complete material discharge without dead corners. When closing, the disc fits upward to the seat with tight sealing for zero-leak shut-off. The valve body is made of high-quality carbon steel, stainless steel 304/316L or glass-lined material, with soft/hard dual sealing. Drive modes include manual and pneumatic (spring return / double-acting). Designed and manufactured in strict accordance withGB/T 12235,HG/T 2138,GB/T 25025. Working pressure: 0.6–2.5MPa, working temperature: -20℃~425℃, nominal diameter: DN25–DN300. It features strong corrosion resistance, erosion resistance, light operation, reliable sealing and easy maintenance, widely used for bottom discharge, sampling and shut-off in chemical, pharmaceutical, dye, food and other industries.

1. Strength of AIX Boiler Export-Oriented Bottom-Out Discharge Valve – Original Factory

AIX BOILER has focused on R&D and production of reactor valves for more than 10 years. We are a modern original factory integrating design, manufacturing, testing and export, with standardized workshops, CNC machining equipment, high-temperature enameling furnaces and a full-performance testing laboratory. We master core technologies such as dead-corner-free structure optimization and sealing surface hardening treatment. Products have passed CE, ISO, FDA, SGS certifications, adaptable to global working conditions. We support multi-language labels and manuals, exporting to over 60 countries in Southeast Asia, Middle East, Europe, South America and beyond.

As an original factory, we offer direct ex-factory prices. The body uses boiler-grade high-quality steel; glass-lined glaze adopts high-silicon anti-corrosion formula; seals use PTFE, flexible graphite or hard alloy. We strictly implement the full process: machining, sandblasting, enameling, precision assembly and pressure testing. OEM/ODM customization is available for material, diameter, pressure, drive, sealing and connection standards (HG/ANSI/DIN), suitable for glass-lined reactors, stainless steel reactors and storage tanks. Cumulative exports exceed 8,000 units with global recognition.

2. Core Technical Parameter Table of AIX Bottom-Out Discharge Valve

3. Product Structure & Core Advantages

1. Bottom-Out Dead-Corner-Free Structure for Complete Residue-Free Discharge
Y-type straight-through integrated body with smooth inner cavity. The disc opens vertically downward, fully clearing the bottom flow path to avoid crystallization, deposition and blockage, especially suitable for high-viscosity, crystallizing and particle-containing media.

2. Dual Sealing System for Reliable Zero Leakage
Food-grade PTFE or flexible graphite soft seal ensures zero leakage for clean and corrosive media. Stellite hard alloy hard seal provides high temperature resistance up to 425℃ and excellent erosion resistance. The sealing surface has self-cleaning effect for long service life.

3. Light Operation & Flexible Control
Opening direction matches gravity for low torque. Manual operation is effortless; pneumatic actuation supports remote automatic control. Manual handwheel and pneumatic actuator with manual override are available for various scenarios.

4. High-Grade Materials for Wide Corrosion Resistance
SS304/316L for general chemicals, food and pharmacy. Glass-lined for strong corrosive media (except HF, hot concentrated phosphoric acid). Carbon steel for non-corrosive oil and water. Internal parts are hardened for long service life of 8–12 years.

5. Compact Structure & Easy Maintenance
Vertical bottom installation with standard flange connection. Modular disc and seal design allows easy replacement without full removal. Routine maintenance is simple, reducing downtime and cost.

6. International Standard Customization & Global Compatibility
Designed according to GB, ANSI, DIN standards, flanges conform to HG20592,ANSI B16.5,DIN2501. Complete export documents and multi-language support are available. Accessories like positioners, limit switches and solenoid valves can be added.

4. Full Export Service System

Professional Customization: Custom solutions based on vessel size, medium, temperature, pressure and operation mode with detailed drawings.

Complete Qualifications: CE, ISO, FDA, SGS, material reports, pressure test reports and certificates for customs clearance.

Strict Inspection: 100% appearance, dimension, hydrostatic test (1.5×PN), air tightness and seal leakage test before delivery.

Professional Packaging: Shockproof foam + wooden case with protected sealing surfaces for safe ocean/land/air transport.

Global After-Sales: 7×24 English support, remote installation guidance, lifetime spare parts and repair service.

5. Executive Standards & Authoritative Certifications

Chinese Standards:GB/T 12235,HG/T 2138,GB/T 25025,GB/T 13927

International Standards:ANSI B16.5,DIN 28008,IEC 60534

Export Certifications: CE, ISO9001, FDA, SGS (available on request)

6. Manufacturing Process & Quality Compliance

AIX bottom-out discharge valves are manufactured with strict lean process: steel forming → CNC precision machining → sandblasting (Sa2.5) → polishing or glass-lined enameling (860–920℃) → precision grinding → assembly → full pressure test → packaging. The glass-lined layer is dense and defect-free; sealing flatness ≤0.02mm. Each valve has a unique code for full traceability.

7. Application Scenarios

Chemical Industry: Acid, solvent and slurry discharge for glass-lined and stainless steel reactors

Pharmaceutical Industry: Clean and corrosive liquid discharge for GMP-compliant sterile reactors

Dye Industry: High-viscosity and crystallizing material discharge

Food Industry: Acidic and high-temperature material discharge for fermentation and processing

Environmental Protection: Corrosive waste liquid and gas treatment

Metallurgy: Acid pickling and leaching system discharge

8. Installation & Operation Notes

1. Installation: Install vertically at vessel bottom with aligned stem. Tighten bolts diagonally; install pneumatic actuator horizontally to prevent medium ingress.

2. Medium Compatibility: Stainless steel not for high chloride or sulfide; glass-lined not for HF, hot concentrated phosphoric acid or strong alkali.

3. Operation: Operate manual valves smoothly; clean lines and adjust air pressure before pneumatic commissioning.

4. Maintenance: Inspect seals every 6–12 months; regrind hard seals if worn; do not scratch surfaces with metal tools.

5. Storage: Seal both ends and store in dry, ventilated area to protect sealing surfaces.

Choose AIX Bottom-Out Discharge Valve for residue-free, high-sealing, long-life reactor discharge solutions. Welcome global customers to contact us and visit our factory for professional customization and full quality assurance!