Resilient Seated Seawater Butterfly Valve

Connection Type

Flange, Lug, Wafer, Welding

Actuation Type

Manual, Worm Gear, Hydraulic, Electric, Pneumatic

ZZJG's resilient seated butterfly valves feature enhanced anti-corrosion capabilities to extend service life by over 50%. Equipped with EPDM/FKM seals and an optimized centerline structure (flow resistance coefficient ≤3.5), they achieve zero-leakage shut-off. Supporting multiple actuation methods and standard connections, they offer comprehensive corrosion protection, customized solutions and integrated control systems for diverse seawater applications.

ZZJG's Advantages

Full-Range Size Coverage for Engineering Requirements: Dimensions cover DN50–4200mm (NPS2''–200''), adapting to small to ultra-large diameter seawater transmission systems, meeting diverse project-scale pipeline control needs.
Wide Pressure Class Ensures Operational Stability: Pressure range: PN0.6–1.6MPa (Class150), matching medium-low pressure seawater scenarios. Structural reinforcement and seal optimization guarantee safe, leak-minimized operation.
Multi-Material Valve Bodies Resist Seawater Corrosion: Options: QT450 ductile iron, WCB carbon steel, SUS304/316/316L stainless steel, plus epoxy coating/fluoropolymer lining. Multi-layer protection resists seawater corrosion, extending service life by over 50%.
High-Performance Soft Seals Ensure Reliable Shut-Off: EPDM/FKM seals (-20°C–200°C) resist seawater aging. Optimized centerline structure achieves "zero leakage" shut-off for long-term operation.
Diverse Actuation Methods Enable Flexible Control: Supports manual worm gear, hydraulic, electric, pneumatic actuation. Compatible with manual/automated systems, meeting precision control and unmanned maintenance needs.
Versatile Connection Types Adapt to Installation Scenarios: Flanged/wafer/lug connections (GB/ANSI/JIS standards) suit submarine pipelines, engine rooms, balancing stress and simplifying installation.
Centerline Structure Optimizes Fluid Dynamics: Disc-body center alignment ensures flow resistance coefficient ≤3.5, reducing energy consumption, torque, and water hammer effects.
Comprehensive Corrosion Protection Ensures Long-Term Reliability: Full-spectrum protection via material selection, coatings, and self-compensating seats, enhancing sealing and cutting maintenance costs.
Specialized Services for Seawater Applications: Custom DN3000+ valves, alloy spraying, and hydraulic+remote monitoring integration, tailored for seawater pumping, cooling, and marine systems.

Product Details

Spec	Detail
Size Range	DN50~4200mm (NPS2"~200")
Pressure Class	PN0.6~1.6MPa (Class150)
Matrial	QT450, WCB, SUS304 / SUS316 / 316L; EPDM, FKM/Viton
Standards	ANSI, API, CE, DIN, EAC, JIS, ISO, EN

Professional Quality

Various Types

ZZJG offers one of the most comprehensive butterfly valve product lines from a single manufacturer including triple-offset butterfly valves, double-offset butterfly valves, high performance butterfly valves etc.

Service Support

ZZJG range of aftermarket services encompasses valve repair, refurbishment, maintenance, custom engineering solutions, and genuine OEM spare parts to sustain optimal equipment performance well after installation.

Processing Ability

ZZJG employs advanced manufacturing technologies using state-of-the-art machinery and equipment to ensure our products perform in the most challenging environments.

Why ZZJG Butterfly Valves?

API 609 International Certification

Fully compliant with API 609 international standard, covering all structural types including double flange, lug, and wafer types, and has obtained global market access qualifications for the petroleum, chemical, and power industries. Class 150 ~ 2500 (PN20 ~ PN420), NPS2" ~ NPS200" (DN50 ~ DN6000), temperature range -40℃ ~ 600℃, zero-leakage, and fireproof with API 607.

Leading Eccentric Structure Design

Double and triple eccentric design, the valve shaft, valve seat, and pipeline centerline are precisely offset, significantly reducing friction and wear. Bidirectional zero-leakage pressure, with built-in anti-sludge and self-cleaning functions, suitable for harsh media such as sewage and slurry, and with a service life more than 3 times longer than conventional butterfly valves.

Reliable and Guaranteed Quality

Founded in 1981 and located in the valve capital of China, this company is a certified National High-Tech Enterprise with R&D investment exceeding 5%. Its 12-step full-process testing procedure, from material verification to finished product delivery, adheres to API 609 inspection standards to ensure zero-defect delivery.

Customized Services for All Conditions

Adaptable to all media including water, steam, oil, acids, alkalis, and gases, meeting the needs of core industries covered by API 609, such as petroleum, natural gas, chemical, and power. Specialized models are developed for different scenarios, such as fully welded, leak-free butterfly valves for heating pipelines and hydraulically controlled slow-closing check valves for hydropower stations.