Bevel Gear Operated Flanged Globe Valve for High Pressure

The Bevel Gear Operated Flanged Globe Valve for High Pressure from Hanno Valve features a 25L cast steel body combined with an A105 forged steel disc hard‑faced with 13Cr alloy. This metallic seat interface resists severe cavitation erosion and particulate wear commonly encountered in boiler feed‑water and saturated steam lines. Designed in compliance with API 600, BS 1873, and GOST standards, the valve utilizes a 304 stainless steel and flexible graphite spiral wound gasket alongside die‑formed graphite stem packing to maintain a zero‑leakage seal under thermal shock. Supported by ISO9001 and API certifications, Hanno Valve subjects each unit to 100% hydrostatic, air‑seat, and radiographical testing, providing refineries and power plants with an enduring, low‑maintenance isolation solution.

Engineering Advantages

• Precision Mechanical Advantage: High‑ratio bevel gearbox allows single‑operator actuation without cheater bars, whereas standard handwheel valves frequently stall or require external pneumatic actuators.
• In‑House Mold & Casting Quality: Unlike assembly‑only suppliers, Hanno produces its own high‑density 25L castings using precoated sand technology, completely eliminating micro‑porosity and internal sand inclusions.
• Triple‑Layer Stem & Bonnet Seal: Bevel Gear Operated Flanged Globe Valve for High Pressure features A193‑B7/A194‑2H high‑tensile alloy bolting paired with expandable graphite packing to meet strict fugitive emission standards.

Technical Specifications

Application Fields

• High‑Pressure Steam Isolation: Main steam lines and bypass isolation in power stations (e.g., China Huadian Group projects).
• Chemical Synthesis Plants: High‑differential pressure hydrocarbon separation units.
• Boiler Feed‑Water Systems: High‑velocity water intake lines requiring zero seat cavitation.

Quality Certifications

• Certifications: ISO9001 Quality Management, ISO14001 Environmental, API 600, CE Mark, TS China Special Equipment License, Russia TC 010/032 Certification.
• In‑House Quality Control: 100% Nondestructive flaw detection (UT/MT), spectral chemical analysis, wall thickness ultrasonic testing, low‑temperature impact testing, and shell/seat hydrostatic pressure testing.
• Testing Documentation: Mill Test Certificates (MTC) per EN 10204 3.1 provided with every order.

Selection Guide

1. Identify Flow Parameters: Confirm operating pressure, maximum fluid temperature, and media viscosity.
2. Select End Connection: Choose Flanged RF (Raised Face), RTJ (Ring Type Joint), or BW (Butt Weld).
3. Verify Gearbox Orientation: Standard top‑mounted handwheel; side‑mount bevel gear extensions available upon request.

Logistics, Packaging & Warranty

• Packaging: Heavy‑duty export wooden cases with moisture‑proof vacuum wrapping and flange end protectors.
• After‑Sales Support: Detailed installation manuals, video maintenance guides, and lifetime technical guidance.
• Warranty Policy: 18 months from shipment or 12 months from installation, including free component replacement for manufacturing defects.

Frequently Asked Questions (FAQ)

How does the bevel gear operator assist in high‑pressure shutoff?

High‑pressure lines exert significant thrust on the valve disc. The bevel gearbox multiplies input torque, allowing operators to seat the disc tightly against flow resistance without over‑exertion.

Can this valve withstand severe thermal shock during steam startup?

Yes. The Bevel Gear Operated Flanged Globe Valve for High Pressure graphite gasket combined with 2Cr13 stem material provides stable thermal expansion coefficients, preventing stem binding or body joint leakage.

Do you support third‑party inspection (TPI) prior to shipment?

Yes, we welcome SGS, BV, TÜV, or customer‑appointed inspectors for dimensional checking, material verification, and hydrostatic pressure testing at our factory.