Specification

TIANYU DN40 150LB A105 Carbon Steel RF Flanged Gate Valve with Handwheel Operation

I. Product Overview

TIANYU DN40 150LB gate valve is a robust industrial flow control solution engineered for medium-pressure pipeline systems. Constructed from A105 carbon steel with an RF flange connection and handwheel actuation, it delivers reliable on-off control for clean media like water, oil, gas, and light industrial fluids. Designed to meet ASME B16.34 and API 600 standards, it balances durability, ease of installation, and cost-effectiveness—ideal for industrial process lines, commercial plumbing, and utility networks where moderate pressure and temperature resistance are critical.

II. Key Attribute Specifications

Category	Details
Size	DN40 (1.5”), suitable for medium-flow pipelines in industrial and commercial systems.
Pressure Rating	150LB (PN20, ~2.0MPa), engineered for low-to-medium pressure applications.
Body Material	A105 carbon steel (ASTM A105), a forged carbon steel with tensile strength 485–655MPa, ideal for non-corrosive media.
Trim Components	– Gate/Seat: Stainless steel (304/316 optional) or stellite-hardfaced A105 for wear resistance. – Stem: A105 carbon steel, nitride-treated for corrosion resistance.
Connection	RF flange (ASME B16.5), ensuring compatibility with standard pipeline gaskets (e.g., spiral-wound, non-asbestos).
Actuation	Handwheel with mechanical linkage, requiring 90°+ rotation for full open/close (linear stem movement).
Temperature Range	-29℃~427℃, covering ambient, hot water, and low-pressure steam applications.

Product Overview

III. Feature Description

Rising Stem Design: The stem rises linearly as the valve opens, providing visual confirmation of position. This design prevents stem rotation within the packing, reducing wear and ensuring consistent sealing—critical for applications like steam lines where valve status visibility enhances safety.
A105 Carbon Steel Durability: A105’s forged construction eliminates internal defects (porosity), enhancing structural integrity under 150LB pressure. In industrial water systems or compressed air lines, it withstands mechanical stress and environmental corrosion better than cast iron, extending service life.
Stellite-Hardfaced Seats: Optional stellite hardfacing on gate/seat surfaces resists abrasion from particulate media (e.g., water with sediment, light slurries). This reduces leakage risk and extends trim lifespan, lowering maintenance costs in process industries.
RF Flange Sealing: The raised face flange creates a metal-to-gasket seal, preventing media bypass under pressure. When paired with spiral-wound gaskets, it ensures leak-tight operation in high-vibration environments (e.g., pump discharge lines).
Handwheel Ergonomics: The handwheel’s mechanical linkage reduces torque required to operate the valve under pressure, enabling smooth, precise control. Even with media pressure, operators can open/close the valve without excessive force—ideal for manual systems in remote or utility applications.

IV. Manufacturing Processes

Forging & Heat Treatment: A105 carbon steel billets undergo hot forging to form the valve body, gate, and stem. Post-forging, components are normalized (heated to 870–920℃, air-cooled) to relieve internal stresses, enhancing toughness and dimensional stability.
Precision Machining: CNC machining centers shape the body, gate, and flange faces to tight tolerances (±0.05mm). The gate and seat surfaces are ground to Ra ≤1.6μm for uniform contact, while stem threads are cut for smooth handwheel engagement.
Assembly & Packing: The gate is guided by the stem and secured with a yoke, ensuring alignment. Graphite-based packing rings are compressed around the stem to prevent leakage, balancing sealing force and stem movement friction.
Testing: Each valve passes:
- Hydrostatic Shell Test: 1.5×150LB (3.0MPa) for 30 minutes to verify body integrity.
- Hydrostatic Seat Test: 1.1×150LB (2.2MPa) with water, ensuring leakage ≤0.1×DN mm³/min (per API 598 Class IV).

Valve Details

V. Product Advantages

Cost-Effective Performance: A105 carbon steel balances strength and cost, avoiding over-engineering for non-corrosive media. In a 5-year commercial building trial, TIANYU valves reduced lifecycle costs by 30% vs. stainless steel alternatives (where not required).
Reliable Sealing: Rising stem design, stellite hardfacing, and RF flanges ensure tight sealing, minimizing energy loss and environmental risks. In steam systems, this prevents costly heat loss and compliance issues.
Easy Maintenance: The handwheel and flanged connection simplify inspection and repair. Maintenance teams can replace packing or trim without removing the valve from the pipeline, reducing downtime in critical systems.
Versatile Compatibility: Handles water, oil, gas, and light chemicals across a wide temperature range. Optional stainless steel trim extends compatibility to mildly corrosive media (e.g., coastal plumbing, food processing).

Application

VI. Product Applications

Industrial Process Lines: Controls non-corrosive fluid flow in manufacturing plants (e.g., water for cooling, oil for lubrication). The 150LB rating suits low-pressure hydraulic or pneumatic systems.
Commercial Plumbing: Manages hot/cold water flow in hotels, hospitals, and office buildings. RF flanges integrate seamlessly with standard piping, ensuring reliable shut-off for fixtures and HVAC systems.
Utility Networks: Regulates medium-pressure water or gas distribution in municipal systems. A105’s durability withstands outdoor exposure, while handwheel operation suits manual control in remote or backup lines.
Steam Systems: Controls low-pressure steam flow in small boilers or heating circuits. Rising stem visibility and stellite hardfacing ensure safe, leak-free operation in temperature-cycling environments.

TIANYU DN40 150LB gate valve: A105 carbon steel, RF flange, handwheel. Reliable for water, oil, gas in medium-pressure systems. Cost-effective, easy to maintain.Customize with: 316 stainless steel trim for corrosion resistance, extended bonnet for cryogenic service, or electric actuators for automation. Tailored to your media, pressure, and control needs.