DN1200 PN10 Double Eccentric Butterfly Valve — Russia Wastewater Project

Double Offset Design | Large Diameter 48" | Bi-Directional Bubble-Tight | Cold Climate Rated

Product Overview

The Laux Valve DN1200  PN10 double eccentric butterfly valve is specifically engineered for Russia municipal wastewater treatment projects requiring reliable isolation and flow control in large-diameter pipelines. The double offset design ensures long service life in demanding wastewater environments, while the ductile iron body with fusion bonded epoxy coating provides excellent corrosion resistance for both above-ground and buried installation.

This valve meets the technical requirements of Russian water utilities, with options for GOST flange drilling, cold climate material selection, and extended stem for buried service. Designed for bi-directional bubble-tight shut-off at full PN10 pressure rating, it is the ideal choice for wastewater treatment plant inlet/outlet, sludge handling, and interconnecting pipelines.

Key Features

• Double Eccentric  Design — Precision double offset geometry lifts the disc completely free of the seat during opening, eliminating seat rubbing and extending service life. Ideal for wastewater applications with frequent cycling and abrasive particulates.
• DN1200  Large Diameter — Full PN10 pressure rating at 48-inch size. U-shaped body section provides optimal strength-to-weight ratio for large-diameter valves, reducing material costs and installation complexity.
• Ductile Iron Body with Epoxy Coating — ASTM A536 65-45-12 ductile iron body with fusion bonded epoxy coating (min 250 microns). Holiday-tested for pinhole-free coverage. Resistant to H2S, sewage gases, and corrosive wastewater environment.
• Bi-Directional Bubble-Tight Seal — Full rated pressure seal in both flow directions per ISO 5208 Rate A. Zero leakage ensures no contamination between process stages.
• Cold Climate Design — Sealing materials and stem bearings selected for reliable operation down to -30°C. Suitable for outdoor installation in Russian winter conditions.
• ISO 5211 Actuator Mounting — Standardized heavy-duty mounting pad for worm gearbox, pneumatic actuator, or electric actuator. Torque considerations for large-diameter disc operation.
• GOST Flange Drilling Available — Flange drilling per GOST 12815-80 or GOST 33259-2015 in addition to EN 1092-2 and ASME B16.5 standards.
• 100% Factory Tested — Shell test at 1.5x rated pressure, seat test at 1.1x rated pressure per API 598 / EN 12266-1.

Why Double Eccentric for Large-Diameter Wastewater?

Standard concentric butterfly valves in large diameters (≥DN600) face two problems: high operating torque and excessive seat wear. The double eccentric design solves both:

• Reduced Torque — The cam action reduces unseating torque by 40-60% compared to concentric valves of the same size. This means smaller, more affordable actuators and gearboxes for DN1200 valves.
• Extended Seat Life — The disc contacts the seat only at the fully closed position. In wastewater service with abrasive particles (sand, grit, sludge), this eliminates seat wear as a failure mode.
• Lower Total Cost of Ownership — Longer seat life + smaller actuator + less maintenance downtime = significantly lower lifecycle cost for large-diameter wastewater valves.

Technical Specifications

GOST Standard Compliance

Flange drilling can be supplied per GOST 12815-80 (PN10, PN16) or GOST 33259-2015 to match Russian pipeline standards. Valves can also be supplied with Russian-language documentation, passports, and material certificates as required for Russian project submissions.

Why Choose Laux Valve for Russia Wastewater Projects?

• 15+ Years Export Experience — Shipped to 45+ countries including cold-climate regions
• Large-Diameter Specialists — Manufacturing capability up to DN2000 for butterfly valves
• Competitive Pricing — Factory direct pricing, 15-25% below European equivalents for comparable quality
• Short Lead Times — 20-30 working days for DN1200 standard configuration
• ISO 9001:2015 Certified — Full quality management with material traceability
• Technical Support — Application engineering for project-specific requirements

Frequently Asked Questions

Q: Can the DN1200 valve be supplied with GOST flange drilling?

A: Yes. We can supply flange drilling per GOST 12815-80 (series 2 or series 3) and GOST 33259-2015. Please specify the required GOST standard and flange series when ordering.

Q: What is the operating torque at DN1200 and how is it handled?

A: The DN1200 double eccentric valve requires significant operating torque. We size the worm gearbox with a 1.5x safety factor over the measured valve torque. For motorized operation, we recommend electric actuators with torque limit switches and manual override handwheel.

Q: How is the valve packaged for Russia shipment?

A: Large-diameter valves (DN1200) are shipped in wooden crates with internal bracing. The disc is secured in the slightly open position (approximately 10°) with wooden wedges to protect the seat during transport. Flange faces are covered with plywood protectors. All bolts and mounting hardware are bagged and included.

Q: What documents are provided for Russia customs clearance?

A: We provide: commercial invoice, packing list, bill of lading, certificate of origin (CO), material test certificates (MTC), hydrostatic test report, quality certificate (ISO 9001), and valve passport in Russian language upon request.

Q: What is the minimum order quantity for DN1200?

A: 1 Pc

Q: Is this valve suitable for buried installation?

A: Yes. The fusion bonded epoxy coating provides excellent corrosion protection for buried service. Extended stem and valve box options are available for buried installations. We recommend Nylon 11 coated disc for buried applications where additional corrosion protection is required.

Ordering Information

For pricing, technical drawings, or project-specific quotations, contact our sales team:

Email: james@lauxvalve.com | Tel / WhatsApp: +86 18920833829

Please provide the following for a quotation: size (DN1200), pressure rating (PN10), flange standard, seat material, operation type, quantity, and any project-specific requirements (GOST standards, documentation, cold climate features).