Specification

API 607 ASME Carbon Steel Ball Valve (304/316, Flange, Metal Seated)

I. Product Overview

Newway API 607 ASME carbon steel floating ball valve is a versatile flow control solution engineered for high-temperature water systems and industrial pipelines. Combining carbon steel (body) with 304/316 stainless steel (internal components), it features a metal-seated design and floating ball structure to handle media like high-temperature water, light oil, and mild chemicals. Operating at -29℃~425℃ and ASME 150LB~300LB pressure, it meets API 607 fire safety standards and ASME flange specifications. With high-temperature resistance, corrosion resistance, and tight sealing, it is ideal for power generation, heating systems, and industrial water circulation where stable performance and safety are critical.

II. Key Attribute Parameters

Size Range: DN15~DN250 (1/2″~10″), covering small to medium-diameter pipelines for flow control in water and industrial systems.

Pressure Rating: ASME 150LB~300LB (2.0MPa~5.0MPa), adapting to low to medium-pressure systems such as boiler feedwater and industrial heating pipelines.

Temperature Range: -29℃~425℃, with carbon steel/304/316 retaining stability under thermal cycling, suitable for high-temperature water and superheated steam.

Material Configuration:

Body: Carbon steel (A105), cost-effective for general high-temperature water systems, with anti-corrosion coating for humid environments.

Ball & Stem: 304 (general corrosion resistance) or 316 (enhanced resistance to chloride) stainless steel, isolating from media to avoid rust.

Seat: Metal-seated (stellite coated), hardness up to HRC60, resisting wear from water with impurities and maintaining sealing at high temperatures.

Connection Type: Flanged (RF per ASME B16.5), ensuring leak-tight integration with standard pipelines and easy disassembly for maintenance.

Actuation: Manual (handwheel) or gear drive (for large diameters), with 90° rotation for quick on-off control.

Design & Test Standards: Design follows ASME B16.34, API 608; testing complies with API 598 (hydrostatic test) and API 607 (fire safety test).

Product Overview

III. Features Description

Metal-Seated High-Temperature Resistance: The stellite-coated metal seat avoids soft seal aging at 425℃, maintaining tight sealing in high-temperature water systems. Unlike PTFE seals, it resists hardening or cracking, ensuring reliability in boiler or heating pipelines.

Dual Material Advantages: Carbon steel body balances cost and high-temperature strength (up to 425℃), while 304/316 stainless steel internal components resist corrosion from water and mild chemicals—avoiding rust-related jamming common in all-carbon steel valves.

Floating Ball Self-Tightening: The ball “floats” and is pushed against the seat by water pressure, enhancing sealing as pressure increases. This self-tightening feature avoids leakage in low-pressure (≤150LB) water systems, critical for water conservation.

API 607 Fire Safety: Integrates fire-safe design—metal seats and graphite backup seals maintain sealing if components degrade in a fire. Post-fire testing confirms 700℃+ resistance, reducing risks in power plant or industrial facility fires.

ASME Standard Compatibility: Flange dimensions and pressure ratings comply with ASME B16.5, fitting seamlessly into global standard pipelines, avoiding adaptation issues in cross-border projects.

IV. Manufacturing Processes

Material Preparation: Carbon steel and 304/316 stainless steel undergo chemical analysis to verify performance. Carbon steel is coated with anti-corrosion paint to resist humidity.

Forging & Machining: Carbon steel body is forged to eliminate defects; ball and seat are CNC-machined to Ra ≤0.8μm. Metal seats are lapped with balls “one-to-one” to ensure 100% contact.

Stellite Coating: Seat and ball surfaces are coated with stellite via plasma welding (0.3~0.5mm thickness), then polished to enhance wear resistance and reduce friction.

Assembly & Testing:

Components are assembled with precision, adjusting stem packing to ensure smooth rotation without leakage.

Hydrostatic Test: Body tested at 1.5×rated pressure (e.g., 7.5MPa for 300LB) for 30 minutes; seat tested at 1.1×rated pressure with water to confirm no leakage.

Fire-Safe Test: Exposed to 700℃ fire for 30 minutes, then tested for post-fire sealing per API 607.

Valve Details

V. Product Advantages

High-Temperature Stability: Metal seats and carbon steel body handle 425℃, outperforming soft-seal valves in boiler and superheated steam systems.

Balanced Cost & Performance: Carbon steel body reduces costs by 30% vs. all-stainless steel valves, while 304/316 internals ensure corrosion resistance—ideal for budget-conscious projects.

Water System Adaptability: Resists scaling and sediment wear in water with impurities, maintaining flow stability in heating or cooling loops.

Fire & Safety Assurance: API 607 certification meets safety regulations for power plants and industrial facilities, reducing fire-related risks.

Easy Maintenance: Flanged connection allows in-line inspection; metal seats extend service life to 15+ years, reducing replacement frequency.

Application

VI. Application Fields

Power Generation: Controls boiler feedwater and superheated steam flow, with high-temperature resistance adapting to 425℃ media and fire safety meeting power plant standards.

Industrial Heating: Regulates high-temperature water flow in factory heating systems, leveraging self-tightening sealing to avoid heat loss and energy waste.

Water Treatment: Manages flow in industrial wastewater or pure water systems, with 316 stainless steel options resisting corrosion from chlorine in treated water.

HVAC & District Heating: Adjusts hot water flow in large-scale heating networks, with metal seats handling frequent operation and avoiding leakage in residential or commercial pipelines.