Flowserve Durco | J~S Machine and Valve

Proven Reliability Plug Valve Solutions

Flowserve Durco plug valves are engineered for dependable performance in severe service applications, including corrosive, abrasive, and high-temperature environments. Learn more about lubricated and non-lubricated plug valve designs, their materials, configurations, and application use cases.

Flowserve’s Durco plug valves are designed for durability, tight shutoff, and consistent operation in demanding industrial systems. These valves provide reliable isolation and long service life, making them a trusted solution across refining, chemical processing, and other critical applications.

Durco Mach1

Durco Mach 1 Non-Lubricated Plug Valve: The Durco Mach 1 valve, engineered by Flowserve, is a high-performance, non-lubricated plug valve designed for reliable and efficient flow control in various industrial applications. This innovative valve ensures minimal maintenance and maximum durability, making it an ideal choice for demanding environments.

The Mach 1 valve features a non-lubricated plug design, reducing the need for frequent maintenance and ensuring smooth operation even in harsh conditions. The innovative non-lubricated plug design minimizes maintenance requirements and ensures consistent operation over the valve’s lifetime.
Fire-Sealed Option: Fire tested in accordance with API 607, Fourth Edition, ensuring safety and reliability in fire-prone environments.
Double D Plug Stem: Accepts most standard actuation equipment, allowing for versatile and easy automation.
In-Line Adjustment: Features in-line adjustment stops to prevent thru-line leakage, enhancing operational reliability.
ISO 5211 Mounting Pad: Universal flange design allows for easy and low-cost actuation, compatible with a wide range of actuators.
Top Cap Tabs: Eliminates stress on fasteners during actuation, improving the valve’s longevity and performance under frequent cycling.
Technical Specifications:
Size Range: Available in sizes from 1/2 inch to 12 inches, ensuring suitability for various piping systems and flow requirements.
Pressure Rating: The Mach 1 valve is designed to handle high-pressure environments, rated for ASME Class 150, 300, and 600 (derated), ensuring robust performance in demanding applications.
Temperature Range:
Technical Specifications: Capable of operating in extreme temperatures, from -20°F to 525°F (-29°C to 273°C), making it ideal for both cryogenic and high-temperature processes.
Materials of Construction: The valve body and plug are available in a variety of materials, including:
Carbon Steel: Suitable for general service.
Stainless Steel (316, 316L): Provides excellent resistance to corrosion and high temperatures.
Alloy 20: Ideal for applications involving sulfuric acid and other aggressive chemicals.
Hastelloy C: Offers superior corrosion resistance in harsh chemical environment.
Seat Material: The valve seats are made from PFA (Perfluoroalkoxy), providing excellent chemical resistance and high-temperature capability. The encapsulated alloy inserts within the seats ensure durability and reliable sealing.

Durco G4 Non-Lubricated Plug Valve

Discover the Durco G4 non-lubricated plug valve from Flowserve, designed for superior performance in chemical processing and other industrial applications. Learn about its innovative features, robust materials, and versatile applications.

The Durco G4 Sleeveline Valve, engineered by Flowserve, stands out as a premier solution for chemical processing and other demanding industrial applications. This non-lubricated plug valve is renowned for its reliability, robust construction, and exceptional performance, offering industries an efficient and maintenance-friendly option for critical flow control needs.

Double D Plug Stem: Compatible with most standard actuation equipment, ensuring consistent and reliable performance across various systems.
Lockout Compliance: Meets OSHA and plant safety requirements for valve sizes ranging from ½" to 3", enhancing operational safety and compliance.
In-Line Adjustable: Allows for easy, on-the-fly adjustments to prevent thru-line leakage, saving maintenance time and ensuring uninterrupted service.
Actuator Mounting Pads: Directly mountable on flanges, providing robust support for automated operations.
Standard PTFE Sleeve: Features a large seal area for positive shutoff and extended service life, offering excellent chemical resistance and high-temperature capability.
Heavy-Duty Body Construction: Comes with a limited lifetime casting guarantee. Available with ANSI (ASA) or DIN flanges, as well as N.P.T. screwed, socket, and butt weld options, ensuring durability and versatility.
Tapered Plug Design: Reduces turning torque and provides independent in-line seal adjustment and wear compensation, extending valve life.
Reverse Lip Diaphragm: Provides a self-adjusting, dynamic stem seal that maintains integrity even under pressure changes.
Raised Locking Ribs: Secure the sleeve within the body, ensuring stable performance and reliable sealing.
Large Port Openings: Minimize pressure drop and enhance flow efficiency with higher Cv values.

Durco G4BZ-HF Marathon Sleeveline HF Alkylation Valve

Explore the Durco G4BZ-HF Marathon Sleeveline HF alkylation valve by Flowserve, engineered for high-cycle, low-emissions service. The Durco G4BZ-HF Marathon Sleeveline HF alkylation valve is designed to provide exceptional performanceThis non-lubricated plug valve is engineered to offer an extra measure of positive stem sealing reliability, making it ideal for applications requiring tight shutoff and emissions containment.

High-Cycle Capability: Engineered to handle high-cycle operations, ensuring long-term reliability and reduced maintenance costs.
Enhanced Stem Sealing: Features a superior stem sealing system that provides an extra measure of reliability, crucial for applications with stringent emissions requirements.
Low Emissions: Designed to minimize fugitive emissions, helping to meet environmental regulations and standards.
In-Line Adjustment: Allows for easy in-line adjustment of the sealing elements, providing quick maintenance and ensuring continuous optimal performance.
Durable Construction: Constructed with high-quality materials to withstand the demanding conditions of refinery operations and other industrial applications.
Materials of Construction: Body and Plug Materials: Options include various high-performance alloys tailored for specific industrial conditions, ensuring durability and resistance to corrosive environments.

Durco G4XZ Sleeveline Plug Valve: High Performance Flow Control

Discover the Durco G4XZ Sleeveline plug valve by Flowserve, designed for reliable performance in reducing emissions and handling hazardous fluids. Learn about its features, materials, and applications.
The Durco G4XZ Sleeveline plug valve is engineered to meet stringent environmental regulations for fugitive emissions while providing exceptional performance in handling lethal, toxic, and sub-zero fluids. This valve is ideal for critical applications requiring tight shutoff and emissions control.

Compliance with Emission Standards: The G4XZ Sleeveline plug valve complies with API 641 (1st edition) and ISO 15848-1-BH-CO3 emission standards, ensuring it meets environmental regulations related to fugitive emissions.
Fire-Safe Design: Designed to meet API 607 (7th edition) and ISO 10497 2010 standards, the valve enhances safety in fire-prone environments.
Zero Leakage Shutoff: Achieves API 698 zero leakage shutoff rating with its soft seats, ensuring reliable sealing and operational safety.
Versatile Applications: Up to 500,000 in-lbs (575,950 cm-kg).Suitable for a range of critical applications, including HF alkylation units, chlor-alkali processing, and handling other lethal, toxic, and sub-zero fluids.
Durable Construction: Constructed with high-quality materials to withstand harsh industrial conditions, ensuring long-term durability and reliability.

Durco T4E Lined Plug Valve

Superior Corrosion Resistance and Relaiability
The Durco T4E lined plug valve by Flowserve, designed for maximum corrosion resistance and product purity. Learn about its features, materials, and applications in chemical processing and other industries.
Engineered to provide maximum corrosion resistance while eliminating product contamination, making it an ideal choice for chemical processing and other industries requiring high purity standards. This valve combines the reliability and durability of Durco products with advanced lining technology to ensure superior performance in harsh environments.

Maximum Corrosion Resistance: The T4E valve is lined with advanced materials that offer excellent resistance to corrosive chemicals, ensuring long-term durability and reliability.
Product Purity: The lining technology eliminates product contamination, making it suitable for applications where purity is critical, such as in the chemical and pharmaceutical industries.
Flexible Actuation Options: Available with pneumatic or electric actuators for both on-off and modulating control applications, providing flexibility in various industrial setups.
Cost-Effective Solution: Offers a competitive total cost of ownership by combining high performance with reasonable pricing, making it a cost-effective choice for a wide range of applications.