8" Class 150# Line Blind valve ASME DIN ISO Carbon Steel

Line blinds are utilized in pipeline systems when there is a need for either complete closure or unimpeded flow transition without a significant drop in pressure. The THD (Through-Hole Design) enables swift and seamless adjustments in position. The THD-slide variant boasts a multi-bolt configuration, making it easier to operate with reduced face-to-face dimensions. The inclusion of extra body bolts renders this style particularly well-suited for high-pressure applications.

10" 150LB line blind valve is made according to ASME B16.34 standard. The valve body is made of A105. It has the structural characteristics of anti-drip. Its connection mode is RF. And it has turbine operation mode.

This DN400 PN40 forged slide blind valve provides positive isolation for steam pipelines and high-temperature industrial systems—physically blocking flow with a solid blind plate to ensure zero leakage during maintenance. Unlike conventional valves that rely on seats that can wear or degrade, this blind valve creates an absolute physical barrier, protecting personnel and preventing costly shutdowns.   The sliding blind mechanism enables operators to switch between flow and isolation positions without depressurizing the line, significantly reducing downtime. Constructed from a one-piece forged A182 LF2 steel body, it delivers exceptional low-temperature toughness (down to -46°C) and reliable performance under PN40 pressure and high-temperature steam service up to 350°C.   Designed to EN12516-1/2 and 100% pressure tested to EN12266-1/2, this valve features RF flanges per GOST 33259-Type B and a gear operator for smooth, high-torque actuation on large-diameter lines. It is a trusted choice for refineries, power plants, and industrial pipeline isolation where safety and reliability are paramount.   Product Parameters   Type Slide Blind Valve Size DN400 Pressure PN40 Connection RF Operation GEAR Body Material A182 LF2 Design Norm EN12516-1/2 Face to face Supplier Standards Flange dimension GOST 33259-Type B Test & Inspection Code EN12266-1/2 Temperature -46 ~ 350°C Applicable Medium Water, Oil and Gas   Features   • True Physical Barrier – Zero Leakage Isolation– Solid blind plate creates a true physical barrier. The one-piece forged LF2 body eliminates weld seams, ensuring structural integrity under PN40 pressure and thermal cycling. • Inline Operation Without Depressurization – Sliding mechanism enables switching without system blowdown. LF2 steel ensures reliable operation down to -46°C, ideal for cold climates and cryogenic steam conditions. • Gear-Operated for Large Diameters – High-torque gearbox ensures smooth and controlled operation for DN400 valves, even under demanding conditions. • Low-Temperature Toughness – ASTM A182 LF2 forged steel ensures reliable operation down to -46°C, ideal for cold climates and cryogenic steam conditions.   Sliding Type Line Blind Valve Technical Drawing Dimension Checking Pressure Testing Painting Nameplate & Packing Inspection Report

This 10-inch Class 150 Sliding Line Blind Valve provides absolute positive isolation for steam turbine pipelines and high-temperature industrial systems. Unlike conventional gate or ball valves that rely on seats subject to wear, the sliding blind mechanism creates a solid physical barrier—delivering zero leakage during maintenance and ensuring personnel safety.   The gear-operated sliding plate allows operators to switch between flow and isolation positions without depressurizing the line, significantly reducing downtime. The drip-proof design prevents fugitive emissions, making it ideal for steam, oil, gas, and other critical services.   Constructed from ASTM A105 forged carbon steel with RF flanges per ASME B16.5, the valve is designed to ASME B16.34 and tested to API 598. It offers reliable performance in applications up to 425°C (sealing dependent), combining durability, safety, and ease of operation.   Product Parameters   Type Sliding Blind Valve Size 10” Pressure 150LB Connection RF Operation Turbine Body Material A105 Design Norm ASME B16.34 Face to face Manufacturer Standard Flange dimension ASME B16.5 Test & Inspection Code API 598 Temperature -29 ~ 150°C (Higher temperature up to 425°C available with metal seat) Applicable Medium Water, Oil and Gas   Features   • Forged A105 Carbon Steel Body – Provides strength and durability for reliable performance in industrial pipeline service. • Drip-Proof Design – Prevents fugitive emissions and protects internal components, making it ideal for environmentally sensitive applications and steam turbine systems. • Absolute Physical Isolation – Solid blind plate provides true physical separation of the pipeline, ensuring safe maintenance without relying on sealing surfaces. • Online Switching – No Depressurization Required – Sliding mechanism allows switching between open and blind positions without pipeline blowdown, reducing downtime and media loss. • Gear-Operated for Large Diameters – High-torque turbine drive enables smooth and controlled operation for large valves, even under demanding conditions.     Slide Type Line Blind Valve Technical Drawing Dimension Checking Pressure Testing Painting Nameplate & Packing Inspection Report

Introduction   This 10" Class 300 Sliding Line Blind Valve provides absolute positive isolation for medium‑ to high‑pressure pipelines, combining the reliability of a solid physical barrier with the simplicity of manual screw‑operated actuation.   Unlike conventional valves that rely on seats prone to wear, the sliding blind mechanism creates a true physical barrier, ensuring zero leakage during maintenance without the need for system depressurization. This significantly reduces downtime and enhances personnel safety.   The manual screw‑operated design offers precise, controlled movement of the blind plate, with inherent self‑locking capability to maintain position under pressure—ideal for applications where electric or pneumatic power may not be available or preferred.   Constructed to ASME B16.34 with RF flanges per ASME B16.5, this valve is available in forged carbon steel (A105), stainless steel, or alloy materials to suit your service conditions. Each unit is 100% pressure tested to API 598.   This 10" Class 300 configuration is a popular choice for steam, oil, gas, and chemical pipelines. Other sizes from 1" to 60" and pressure classes up to Class 2500 are available as part of our full line blind valve series.   THD-Slide Cutout   Features   1.Manual Screw‑Operated with Self‑Locking Precision screw drive allows smooth, controlled positioning of the blind plate. The self‑locking mechanism maintains position under pressure without additional braking devices.   2.Absolute Physical Isolation Solid blind plate creates a true barrier, ensuring zero leakage during maintenance—unlike seat‑dependent valves that can wear or degrade over time.   3.Inline Operation Without Depressurization Sliding mechanism enables switching between flow and blind positions without system blowdown, reducing downtime and product loss.   4.10″ Class 300 – The Optimal Balance Offers higher pressure capability than Class 150 while remaining more economical than Class 600, making it a versatile choice for a wide range of industrial applications.   5.Forged Carbon Steel Construction A105 forged body provides high strength, impact resistance, and reliable performance under thermal cycling.   6.Tested to API 598 100% hydrostatic and pneumatic testing ensures leak‑tight performance before shipment.   Standard Specifications   Parameter Specification Type Sliding Line Blind Valve Size 10″ (DN250) Pressure Rating Class 300 (PN50) Connection RF Flange, ASME B16.5 Operation Manual Screw-Operated (Self-locking) Body Material A105 Forged Carbon Steel (other alloys available) Seal / Seat Material Metal-to-Metal (Stainless Steel + Graphite) Design Standard ASME B16.34 Face-to-Face Dimension Per ASME B16.10 or manufacturer standard Test & Inspection API 598 (100% hydrostatic & pneumatic) Temperature Range -29°C to +425°C (depending on sealing) Applicable Media Steam, Oil, Gas, Water, Hydrocarbons Application Pipeline isolation, refineries, petrochemical plants, power generation   Technical Drawing Flexible Design Options   Tailored Configurations for Demanding Applications Beyond the base model, this line blind valve can be customized for high-temperature service, fire-safe requirements, and zero-emission (drip-proof) operation. For installations where space is at a premium, a compact variant is available, offering the same robust isolation performance in a reduced footprint.   Simplified Seal Maintenance– No Disassembly Required   Seals are integrated into the spectacle plate, allowing operators to inspect or replace them without dismantling the valve. Condition checks can be performed while the valve remains in service, before any position change, ensuring seal integrity is verified before operation.   Low Total Cost of Ownership   The valve’s streamlined, heavy‑duty construction delivers reliable positive shut‑off with minimal upkeep. Its unique actuation mechanism allows a single operator to quickly and safely isolate the pipeline—no tools required—reducing labor time and simplifying maintenance procedures.   Options   ●Hand Wheel Extensions ●Locking Device ●Limit Switches ●Drain/Vent ports ●Spectacle Plate Covers to Protect Seals ●Compact Design (integral tapped end flange) ●Rain/Dust Shield ●Torque Limiter