Integral U-Shaped Monolithic Body
Combines short face-to-face body geometry into a self-contained structure, perfectly suited for piping systems requiring strict installation profiles.
U-TYPE BUTTERFLY VALVE
Integral U-Type Short Body Structure for Reliable Medium-to-Large Diameter Pipeline Isolation
Engineered with an integral U-shaped body and dual-flange connection faces, delivering robust zero-leakage sealing, exact face-to-face installation, and project-grade dependability for municipal waterworks and industrial circulation networks.
DN150–DN600 · PN10 / PN16 · Potable Water & Industrial Circulation
Ready to verify pipeline specifications or obtain certified engineering documents?
What Is a U-Type Butterfly Valve?
Combining an integral compact U-profile body with direct double-flanged bolt connections to provide precise, secure piping integration for mid-to-large diameter water transmission. For an overview of body and sealing options, explore our butterfly valve range.
The U-Type Butterfly Valve features a monolithic short-pattern body with dedicated flange faces on both sides, bolting directly into pipeline flanges without sharing generic wafer dimensions. Engineered specifically for DN150 to DN600 pipelines across PN10 and PN16 pressure ratings, each unit delivers rigid mechanical alignment and resilient concentric sealing. Face-to-face dimensions and flange drillings conform strictly to approved GA drawings, eliminating pipeline misalignment during critical project commissioning.
Integral U-Shaped Short Body
Monolithic casing encloses disc and seat within a compact footprint, offering exceptional structural rigidity.
Double-Flanged Interfaces
Direct bolting on both ends eliminates tie-rod expansion issues and simplifies routine maintenance.
Mid & Large Diameter Duty
Optimized hydraulic flow path engineered specifically for DN150–DN600 potable and circulation lines.
Need exact dimensional drawings and certified torque data for your upcoming tender?
Request GA Drawing & Engineering DataClearer, More Dependable Connection and Isolation for Medium-to-Large Water Systems
From rigid flange pairing and dimensional fidelity to project-grade validation, the U-Type Butterfly Valve delivers decisive piping integrity while minimizing interface mismatch and on-site commissioning risks.
Direct Double-Flanged Connection
Flange faces bolt directly to matching pipeline flanges per certified GA drawings, facilitating precise engineering alignment and rapid field verification. Compare our flanged butterfly valves for other double-flanged body configurations; use the approved drawings to confirm interface suitability.
Engineered for Mid & Large Water Systems
Optimized for municipal supply, treated water conduits, and industrial circulation loops, providing stable shutoff across DN150–DN600.
Project-Grade Sizing & Testing
Configured strictly according to actual line fluid, temperature, and differential pressure, backed by certified pressure testing to prevent cross-model errors.
Need certified performance ratings or custom flange drillings for your project specification?
Why Choose an Integral U-Type Short Body Structure?
The U-Type design establishes an independent installation interface that retains compact butterfly valve efficiency while ensuring absolute dimensional and flange bolt clarity.
Unlike conventional wafer-style valves that rely on long spanning studs, our U-Type Butterfly Valve incorporates dedicated integral flange faces. Face-to-face lengths and bolt patterns are verified according to dedicated GA drawings, preventing installation errors caused by generic wafer substitutions.
Direct & Explicit Flange Alignment
Bolts directly into pipeline companion flanges, providing transparent hole pattern verification and rigid mechanical anchoring before commissioning.
Optimized for DN150–DN600 Pipeline Layouts
Maintains minimal face-to-face envelope while eliminating tie-rod elongation risks typical of large-diameter wafer installations under hydraulic thrust.
Eliminates Specification & Sizing Ambiguity
Manufactured to exact approved GA standards, preventing critical on-site dimensional mismatches caused by misapplying generic wafer or lug standards.
Have specific face-to-face requirements or custom drilling standards to verify?
Integrated U-Profile Body Forming a Robust Double-Flanged Sealing Interface
The U-Type Butterfly Valve integrates an ultra-rigid short-pattern body and dual connection flanges into an autonomous structure, ensuring installation dimensions and bolt holes strictly comply with dedicated engineering drawings.
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Integral U-Shaped Short Body
Encloses the disc, stem shaft, and vulcanized seat within a unified casting envelope, forming a self-contained valve architecture free from wafer tie-rod flex.
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Dual-Sided Flanged Ports
Full perimeter flange faces bolt directly onto pipeline counter-flanges, establishing an unmistakable mechanical interface and rigid pipeline anchoring.
Integral U-Body
Dual-Flanged Faces
Concentric Disc
GA-Certified Dimensions
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Dedicated Face-to-Face & Hole Patterns
Face-to-face lengths and bolt patterns are strictly defined by proprietary General Arrangement drawings, never borrowed from generic wafer models.
Need full dimensional parameters or step CAD files for piping layout verification?
Download Engineering GA & 3D Models
Engineered for Reliable Medium-to-Large Diameter Water Isolation
The U-Type Butterfly Valve is primarily designed for water networks and closed circulation loops where explicit flange anchoring, compact length, and dependable shutoff are essential.
Municipal Water Distribution
Deployed in municipal intake pump manifolds, bulk transmission pipelines, and distribution corridors requiring positive mechanical flange pairing.
Operating Conditions
Clean & Treated Water
5–60°C · PN10 / PN16
5–60°C · PN10 / PN16
Potable Water Works
Configured with certified wetted trim and food-grade epoxy coating to satisfy drinking water compliance, filtration loops, and storage reservoirs.
Operating Conditions
Potable Drinking Water
5–40°C · Working Pressure ≤10 barg
5–40°C · Working Pressure ≤10 barg
HVAC Circulation Systems
Installed in central chiller plants, heat exchange loops, and secondary cooling circulation lines demanding compact face-to-face installation envelopes.
Operating Conditions
Chilled Water / Inhibited Glycol
5–60°C · Working Pressure ≤10 barg
5–60°C · Working Pressure ≤10 barg
Industrial Cooling Circuits
Engineered for heavy plant utilities, power station auxiliary loops, and continuous recirculation systems requiring low headloss and zero leakage.
Operating Conditions
Circulating Water / 0–40% Glycol
5–60°C · Working Pressure ≤10 barg
5–60°C · Working Pressure ≤10 barg
Have unique operating parameters or specific media conditions for your facility?
Submit Project Media & Flow Conditions
Verify Media Chemistry and Thermal Boundaries Prior to Configuration
The operational safety of a U-Type Butterfly Valve depends on the composite interaction of fluid properties, working temperature, pipeline pressure, and wetted metallurgy—never determined by PN ratings alone.
Clean & Treated Water
Engineered for municipal water distribution, intake transmission mains, and general industrial plant utility clean-water lines.
Operating Temperature
5°C to 60°C
Pressure Envelope
PN10 / PN16
Max 10 / 16 barg @ 20°C, limited by actual line PS(T) ratings and dynamic hydraulic transients.
Selection Guide: When specifying standard EPDM seats, verify operating differential pressure, shutoff head, and flange drillings against certified GA drawings.
Potable Drinking Water
Designed with food-grade wetted trims for human consumption networks, filtration galleries, and regional municipal supply infrastructure.
Operating Temperature
5°C to 40°C
Pressure Envelope
Working Pressure ≤10 barg
Governed by the lower value between applicable health compliance certifications and model PS(T).
Selection Guide: Standard water trims must not be assumed compliant for potable duty. Internal epoxy coatings and vulcanized liners require designated project verification.
Circulation & Glycol Loops
Suitable for centralized HVAC chilled/hot water, industrial condenser circuits, and closed heat-exchange loops.
Permissible Media
Treated Water / 0–40% Glycol
Aqueous solution with approved rust-inhibitor packages.
Operating Envelope
5°C to 60°C · ≤10 barg
Selection Guide: Inquire with exact glycol concentration, system pH, fluid density, and viscosity to validate elastomer compatibility and flow sizing.
Need to verify elastomer compatibility or specific chemical concentrations for your facility?
Consult Media & Flow Engineers
Precise Diameter, Pressure, and Temperature Boundaries
All technical parameters must be verified concurrently within the same nominal size, pressure class, wetted trim, and elastomer rating. Maximum values from isolated specifications cannot be combined.
DN150–600
Nominal Bore Range
Standardized production covering 6-inch to 24-inch medium-to-large industrial piping systems.
PN10 / PN16
Nominal Pressure Classes
Maximum permissible working pressure of 10 and 16 barg at 20°C, conforming to EN 12266-1 standards.
5–60°C
Standard Water Thermal Range
Optimized for clean utility lines, potable drinking networks, and continuous closed-loop cooling towers.
Certified Operating Boundaries Across Service Conditions
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Treated Clean & Utility Water
General Municipal & Plant Piping
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Engineering Note: Maximum working pressure is subject to certified valve PS(T) ratings, differential shutoff limits, and flanged pipe class.
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Potable Drinking Water
Certified Human Consumption Lines
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Engineering Note: Working parameters are governed strictly by the lower threshold between regional health certification scopes and model PS(T).
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HVAC & Industrial Circulation
Secondary Closed Loops & Glycol
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Engineering Note: System project engineers must provide fluid concentration, pH, inhibitor composition, and viscosity for torque and seal verification.
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Need project-specific P–T curves or differential pressure calculations for tender submittal?
Request Project Pressure–Temperature Data
Critical Wetted Metallurgy Configured for Water Networks
Standard water duty U-Type Butterfly Valves are anchored by high-grade ductile iron bodies, precision stainless steel wetted trims, and resilient vulcanized EPDM seals, verified to match exact pipeline chemical conditions.
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Valve Body EN-GJS-450-10 Ductile Iron
Functions as the primary pressure boundary, providing robust mechanical strength, pressure containment, and rigid dual-flanged anchoring across DN150–DN600 spans.
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Valve Disc CF8M (316) Stainless Steel
Serves as the central wetted shutoff component, featuring a streamlined edge profile that delivers smooth hydrodynamic passage and zero-leakage closure sealing.
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Shaft & Stem High-Strength Stainless Steel
Transmits operating torque and sustains hydraulic dynamic thrust without deflection; dimensional sizing is calculated from nominal bore and peak shutoff head.
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Resilient Seat Vulcanized EPDM Elastomer
Provides bubble-tight bidirectional shutoff across 5°C to 60°C; bonded directly to the casing to eliminate seat distortion under turbulent municipal flows.
Need customized disc metallurgy (Al-Bronze) or certified potable water trim verification?
Request Full Material BOM & Test Certificates
From Manual Operation to Automated Control, Matched to Line Dynamics
The U-Type Butterfly Valve accommodates lever, worm gearbox, electric motor, and pneumatic actuator configurations, selected strictly in accordance with operating differential pressure and dynamic seating torques.
Manual Lever Operation
Suitable for rapid local open/close actuation where piping accessibility is direct and line pressure remains low.
Selection Focus
Must be evaluated against nominal bore (≤DN150 recommended) and differential shutoff torque to ensure ergonomic field effort.
Worm Gearbox Operator
Delivers high mechanical reduction for controlled, smooth manual isolation without hydraulic water hammer risks.
Selection Focus
Gearbox sizing is calculated from peak unseating torque; handwheel clearance and position indicators must be field verified.
Electric Multi-Turn/Quarter
Engineered for centralized plant SCADA control, automated throttling, and remote digital isolation commands.
Selection Focus
Motor output must include 1.3x safety margin over break torque; power supply (380V/220V) and feedback signals require definition.
Pneumatic Rack & Pinion
Ideal for automated industrial water distribution facilities with reliable compressed instrument air networks.
Selection Focus
Double-acting or spring-return fail-safe sizing depends on available supply air pressure (4–7 bar) and emergency shutoff speed.
Need custom actuator sizing calculations or electrical wiring diagrams for engineering review?
Consult Actuation & Control Engineers
Verify Face-to-Face, Flange Drillings, and Project Interfaces Prior to Installation
The U-Type Butterfly Valve possesses dedicated structural face-to-face lengths and flanged bolt patterns. Sizing must be verified against certified General Arrangement (GA) drawings—never interchanged with wafer models.
A
Face-to-Face Structural Length
B
Flange Standard & PCD Drilling
C
Pipeline Centerline Alignment
D
Actuator Space Envelope
Face-to-Face Structural Length
Face-to-Face | Verified per Approved GAGuarantees precise pipe-spool gap compatibility per ISO 5752 series 20 or EN 558 standards, preventing axial pipe stress and line deformation during flange bolt torqueing.
Flange Standard & Drillings
DN + PN + Flange PCD | Point ConfirmationEnsures 100% bolt circle diameter (PCD), hole count, and thread pitch alignment with EN 1092-2, ASME B16.5, or JIS specs without on-site reaming or mechanical misalignment.
Pipeline Alignment & Centerlines
Pipeline Centerline | Spatial CheckMaintains concentric disc rotation along the geometric pipe axis, protecting inner vulcanized elastomer liners from eccentric point friction and edge gouging.
Actuation Envelope Clearance
Actuator Clearance | Operator TypeValidates overhead and lateral spatial envelopes for manual worm gears, pneumatic pistons, or electric actuators, ensuring unhindered maintenance access and override travel.
Engineering Integration Rule
Critical Standard: U-Type face-to-face dimensions must never be substituted with wafer valve bodies. Submit line pipe schedule, gasket thickness, and bolt specifications for drawing validation.
Need certified GA drawings or customized bolt drillings for engineering approval?
5 Decisive Engineering Steps to Freeze Your U-Type Butterfly Valve Configuration
Starting from medium chemistry and line operating boundaries to flow parameters, flange drillings, and actuation logic—freezing project data into certified BOMs and drawings.
STEP 01
Verify Media Properties
Identifies chemical composition (potable, raw, glycol mix, pH 2-12) to select ductile iron, WCB, CF8M discs and EPDM/NBR/FKM seat liners.
STEP 02
Define Temp & Pressure
Establishes continuous operating temperature ranges (-20°C to 150°C), design PN ratings (PN10/16/25), and full bi-directional shutoff ΔP.
STEP 03
Evaluate Dynamics & Kv
Calculates design velocity, flow coefficients (Kv/Cv), head loss restrictions, and hydrodynamic disc torque to avoid cavitation and seat wear.
STEP 04
Interface & Actuation
Fixes ISO 5211 top flange dimensions, stem shaft sizing, manual worm-gear or automated quarter-turn electric/pneumatic actuator integration.
STEP 05
Freeze Configuration
Locks verified bill of materials (BOM), certified 2D/3D arrangement drawings, hydrostatic factory acceptance testing (FAT), and ITP files.
Ready to start engineering sizing or need technical deviation review?
Every U-Type Butterfly Valve Tested to Exact Configuration Boundaries
From casting pressure containment to soft-seat closure integrity, testing protocols correspond strictly with project nominal PN classes, metallurgy, and certified FAT acceptance criteria.
EN 12266-1 / ISO 5208
Shell Proof Testing
Seat Leakage Closure
Hydrostatic Shell Proof Testing
Applies certified 1.5x design pressure to confirm cast iron body integrity, eliminating porosity defects, structural deformation, and external flange seepage.
Resilient Soft-Seat Closure Sealing
Validates bi-directional bubble-tight shutoff against the vulcanized EPDM elastomer liner at 1.1x design pressure to confirm rate-A zero leakage.
Kinematic & Actuation Function Check
Executes open-to-close cycling, gearbox travel verification, and automated actuator limit-switch calibration to guarantee unhindered dynamic movement.
Need witness testing inspection (TPI) or EN 10204 3.1 pressure inspection certificates?
Request Testing Protocols & Sample Inspection Reports →
From Approved GA to Unique Serial ID: Full Batch Traceability Guaranteed
Every U-Type Butterfly Valve production batch binds certified drawing approvals, metallurgy revisions, and hydro-test logs, enabling procurement, engineering, and audit teams to verify compliance. Review RUITO's manufacturing and traceability capabilities for supplier qualification.
Datasheet | Technical Spec
Specifies DN/PN, working temperature range, maximum shutoff ΔP, elastomer grade, and dynamic torque data.
GA Drawing | Installation Blueprint
Supplies certified face-to-face dimensions, flange drilling PCD, bolt quantities, and actuator envelope boundaries.
BOM & Material List
Explicitly details ductile iron grade, CF8M disc metallurgy, stem heat treat, and vulcanized EPDM polymer blend.
P–T / Torque / Kv Data
Provides certified pressure-temperature curves, Kv/Cv flow characteristics, and calculated dynamic opening torques.
ITP & Inspection Records
Provides comprehensive Inspection and Test Plans alongside certified 3.1 material chemical logs and pressure FAT reports.
IOM & MDR Delivery Dossier
Furnishes Installation, Operation, and Maintenance manuals bound into the final Manufacturing Data Report (MDR).
Need a sample Manufacturing Data Report (MDR) or comprehensive ITP file for engineering pre-qualification?
Download Complete Project Quality Dossier →
Tell Us Your Project Parameters to Receive a Verified Valve Solution
Submit your baseline line conditions and procurement schedule. Our engineering team validates wetted metallurgy, DN, PN, dynamic shutoff ΔP, and flange drilling prior to formal technical quotation.
Engineered to Actual Service Boundaries
Configurations verified against specific fluid chemistry, operating temperature, line pressure, and shutoff head—never quoted blindly by bore size alone.
Dedicated U-Profile Interface Matching
Face-to-face dimensions and flange bolt drillings checked against proprietary U-Type GA blueprints, eliminating on-site pipe misalignment.
Certified Metallurgical & Elastomer BOMs
Formal bills of materials (Ductile Iron, CF8M, SS shafts, vulcanized EPDM) provided up front so procurement and QA teams know exact wetted specs.
100% Documented Hydrostatic Quality Testing
Shell proof and soft-seat closure leak tests performed under EN 12266-1 / ISO 5208, backed by calibrated digital gauge charts and 3.1 certs.
Direct Manufacturing Dossiers & Heat Traceability
Laser-engraved serial IDs trace physical valve bodies back through mill test logs, BOM revisions, FAT hydro records, and export crates.
Complete RFQ inquiries receive preliminary sizing & deviation assessments within 2 business days.
Request Engineering Sizing & Quotation
Provide your project service parameters below to receive certified drawings and quotation.