High-Performance Butterfly Valves
Precision Engineered for Large-Scale Flow Control

Our butterfly valves are manufactured to PN10-PN25 (150-600 PSI) pressure ratings according to DIN/EN/ANSI standards, with operating temperatures from -10°C to 200°C (14°F to 392°F). High-performance designs with metal-seated configurations extend service capabilities to PN40 (900 PSI) for industrial applications. Temperature ranges depend on disc material and seat configuration, with EPDM seats suitable for general service and PTFE seats for chemical compatibility up to 200°C.

Resilient-seated designs with EPDM or NBR provide tight shutoff for water, HVAC, and general industrial applications up to 16 bar (232 PSI), ideal for frequent operation and cost-sensitive projects. Metal-seated configurations using 316SS or Stellite offer superior durability for high-temperature steam, chemical processing, and abrasive media applications up to 25 bar (363 PSI), enabling extended service intervals and fire-safe operation per API 607 requirements.

Concentric disc design offers symmetric flow patterns suitable for on/off service and general flow control with Cv values up to 85% of pipe area. Eccentric offset designs reduce seat contact during operation, extending service life and providing superior throttling control with linear flow characteristics. Double-offset configurations combine reduced operating torque with improved sealing performance for large diameter and high-differential pressure applications.

Actuator torque requirements depend on valve size, differential pressure, and disc design. Our technical data sheets provide breakaway and running torque values for each size and pressure rating. Pneumatic actuators typically require 1.5x safety factor for normal operation, with double-acting cylinders recommended for fail-safe applications. Electric actuators include integral torque switches and position feedback for precise flow control and system integration capabilities.

WRAS-approved configurations utilize ductile iron bodies with NSF-certified EPDM seats and 316L stainless steel discs for potable water systems. Food-grade applications require all-stainless construction per 3-A sanitary standards, with electropolished wetted surfaces and FDA-compliant elastomers. Material certificates documenting compliance with drinking water regulations and food contact approvals are provided with each shipment for traceability requirements.

Standard DN50-DN300 configurations in common materials ship within 5-15 business days from our inventory. Custom sizes DN25-DN1200 or special materials require 15-25 days manufacturing lead time depending on specification complexity. Emergency service provides 72-hour expedited production for critical applications, subject to size and material availability. Blanket orders and consignment inventory programs eliminate lead times for project-critical spare parts and maintenance requirements.

Standard 12-month warranty covers manufacturing defects with replacement valves shipped at no charge including expedited freight. ISO 9001 quality management ensures 100% hydrostatic testing at 1.5x working pressure and full dimensional inspection per ASME B16.34 requirements. Defect rates maintain below 0.5% through statistical process control, with complete material traceability and third-party inspection available for critical applications requiring enhanced quality documentation.

Comprehensive application engineering includes sizing calculations, material compatibility analysis, and actuator selection based on process conditions and control requirements. Our technical team provides written recommendations with supporting flow coefficient data and pressure drop calculations. Remote technical support continues throughout valve service life, including troubleshooting guidance, maintenance procedures, and replacement part identification for optimal system performance.

Complete documentation package includes material test certificates per EN 10204 3.2 standards, dimensional inspection reports, hydrostatic test results, and operation/maintenance manuals in English. CE marking and declaration of conformity are provided for European markets, with additional certifications such as WRAS, DNV, or ABS available for specific applications. Custom test protocols and third-party inspection certificates can be arranged for project-specific quality assurance requirements.

Volume discounts apply for quantities starting at 10 pieces of identical specification, with additional savings for larger quantities and multi-year framework agreements. Project-specific pricing considers total package value including accessories and technical support services. Long-term partnership agreements provide price protection, priority production scheduling, and dedicated technical support for qualified customers with annual volumes exceeding minimum thresholds.