Electric Actuated Flanged Butterfly Valve D941X

Electric Actuated Flanged Butterfly Valve D941X Purpose

This product is used for the water supply and drainage system in tap water, sewage, building, chemical. industries, usually used as an open-close equip rent.

Electric Actuated Flanged Butterfly Valve D941XValve Definition and Components

1.1 What is D941X Electric Actuated Flanged Butterfly Valve?

D941X is a standardized Chinese designation for an electrically operated butterfly valve:

• D: Butterfly Valve
• 9: Electric Actuation
• 4: Flanged Connection
• 1: Center-line/Concentric Design
• X: Resilient (Rubber) Seat

This is a complete automated valve package combining a concentric flanged butterfly valve with an electric motor actuator, designed for remote or automated flow control in piping systems.

1.2 Main Components

Component	Sub-Components	Material/Type	Primary Function
1. Valve Body Assembly	• Valve Body	Ductile Iron/Cast Steel/Stainless Steel with EPDM/NBR seat	Provides flow control and pressure containment
	• Disc
	• Stem
	• Resilient Seat
	• Bearings & Seals
2. Electric Actuator	• Electric Motor	Industrial-grade motor with IP67/IP68 enclosure	Converts electrical signals to mechanical rotation
	• Gear Reduction System
	• Limit Switches
	• Torque Switch
	• Control Module
	• Manual Override
3. Mounting Assembly	• Bracket/Adapter	Steel or aluminum alloy	Securely connects actuator to valve
	• Coupling
	• Mounting Bolts
4. Control System	• Local Control Box	Electronic components with NEMA 4X/IP65 enclosure	Provides control interface and status indication
	• Position Feedback
	• Signal Interfaces
	• Power Supply
5. Position Indicator	• Mechanical Pointer	Visual/electronic indicators	Shows valve open/closed status
	• Electronic Position Transmitter

Key Actuator Types:

• On-Off Type: Simple open/close control
• Modulating Type: Precise positioning (4-20mA/0-10V control)
• Smart/Intelligent: With digital communication (HART, Profibus, Fieldbus)

Role, Characteristics, and Application Scenarios of Electric Actuated Flanged Butterfly Valve D941X in Pipelines

2.1 Pipeline Functions

• Remote Operation: Enables control from control rooms or SCADA systems
• Automated Process Control: Integrates into automated sequences and safety systems
• Emergency Shut-off: Quick response to safety interlocks
• Flow Regulation: Precise control (with modulating actuators)
• Status Monitoring: Feedback of valve position to control systems

2.2 Operational Features

Feature	Description	Benefit
Rapid Operation	Typically 15-60 seconds for 90° rotation	Quick system response
High Positioning Accuracy	±0.5% to ±1% of full scale (modulating type)	Precise flow control
Fail-Safe Options	Spring return or battery backup	Safety in power loss
Duty Cycle	Continuous or intermittent duty rated	Matches application needs
Environmental Protection	IP67/IP68, Explosion-proof options	Suitable for harsh conditions
Diagnostic Capabilities	Smart actuators with self-diagnostics	Predictive maintenance
Local/Remote Control	Local pushbuttons + remote signals	Operational flexibility

2.3 Application Scenarios

Typical Industry Applications:

• Water/Wastewater Treatment: Pump control, filter sequencing, chemical dosing
• HVAC Systems: Building automation, chilled/heating water control
• Industrial Processes: Batch processing, mixing, filling operations
• Fire Protection: Automatic sprinkler system control
• Irrigation Systems: Automated zone control
• Power Plants: Cooling water, condensate, and feedwater systems

Electric Actuated Flanged Butterfly Valve D941X Standards: Materials, Design, and Connections

3.1 Material Standards

Component	Standards	Common Materials
Valve Body/Disc	ASTM A126, ASTM A216, ASTM A351	Ductile Iron (QT450-10), WCB, CF8/CF8M
Stem	ASTM A276, ASTM A564	304SS, 316SS, 17-4PH
Seat	FDA, NSF/ANSI 61, WRAS	EPDM, NBR, Viton
Actuator Housing	IEC/EN 60529	Aluminum alloy, reinforced plastic
Electrical Components	UL, CSA, CE	Industrial-grade components

3.2 Fire protection water supply Design Standards

Standard	Application	Key Requirements
API 609	Butterfly Valve Design	Pressure containment, design life
ISO 5211	Mounting Interface	Actuator-to-valve connection dimensions
IEC 60534	Industrial Process Control Valves	Actuator performance requirements
ISO 15848	Fugitive Emissions	Stem seal leakage requirements
ATEX/IECEx	Explosive Atmospheres	Explosion-proof construction
SIL	Safety Integrity Level	For safety instrumented systems

3.3 Connection Standards

Connection Type	Standards	Common Specifications
Flange Connection	ASME B16.5, EN 1092-1, JIS B2220	Class 150/PN16, RF face
Electrical Connection	IEC 60079, NEC	Conduit entry, cable glands
Signal Interface	NAMUR, IEC 61131	4-20mA, 0-10V, digital protocols
Mounting Interface	ISO 5211	F05-F14 mounting pads

3.4 Electrical Standards

Protection Class: IP65/IP67/IP68 (IEC 60529)

Explosion Protection: ATEX, IECEx for Zone 1/2, 21/22

Power Supply: 24VDC, 110VAC, 220VAC, 380VAC, 50/60Hz

Insulation Class: Class F or H (155°C or 180°C)

Duty Rating: S2 (short-time duty) or S4 (intermittent duty)

How to Select Electric Actuated Flanged Butterfly Valve D941X

4.1Butterfly Valve for Water Specification Development Process

4.2 Critical Specification Elements

1. Valve Specifications:

• Size: DN50 to DN1200 (2" to 48")
• Pressure Class: PN10/PN16/Class 150
• Body Material: Based on fluid compatibility
• Seat Material: EPDM (water), NBR (oil), Viton (chemicals)
• End Connection: Flange type and standard

Actuator Specifications:

• Torque Requirement: Calculate based on valve size, pressure, and frequency
• Required Torque = Valve Breakaway Torque × Safety Factor (1.5-2.0)
• Operation Time: 15, 30, 60 seconds/90°
• Power Supply: Voltage and phase
• Duty Cycle: Continuous (S4) or intermittent (S2)
• Fail-Safe Mode: Spring return (FC/FO) or battery backup
• Protection: IP rating, explosion-proof certification

Control Requirements:

• Control Signal: Discrete (24VDC) or analog (4-20mA)
• Position Feedback: Potentiometer, encoder, or switches
• Communication: HART, Profibus, Foundation Fieldbus
• Local Controls: Handwheel, pushbuttons, selector switch
• Diagnostics: Smart features, predictive maintenance

Environmental Requirements:

• Ambient Temperature: -20°C to +70°C standard
• Hazardous Area: ATEX Zone 1, 2, 21, 22
• Special Conditions: Submersion, washdown, corrosive atmosphere

4.3Fire Protection System Supplier Evaluation Criteria

Evaluation Area	Weight	Key Criteria
Technical Compliance	30%	• Meets all specifications
		• Valid certifications
		• Engineering support
Quality & Reliability	25%	• ISO 9001 certification
		• Testing procedures
		• MTBF data
Delivery & Service	20%	• Lead time
		• Technical support
		• Spare parts availability
Cost Effectiveness	15%	• Initial cost
		• Lifecycle cost
		• Energy efficiency
Experience & References	10%	• Similar applications
		• Customer testimonials

4.4 Order Documentation

Ensure purchase order includes:

Detailed technical data sheets

Approved vendor list for critical components

Inspection and test plan (ITP)

Documentation deliverables list

Warranty terms and conditions

Spare parts requirements

Pre-Shipment Inspection for Export Electric Actuated Flanged Butterfly Valve D941X and Key Considerations

5.1 Comprehensive Inspection Protocol

Stage 1: Documentation Review

• Material certificates (EN 10204 3.1 for metallic parts)
• Actuator certification (ATEX, CSA, UL if applicable)
• Electrical component certificates (CE, RoHS)
• Test reports for valve and actuator
• Calibration certificates for test equipment
• Operation and maintenance manuals

Stage 2: Visual Inspection

Item	Check Points	Acceptance Criteria
Valve Assembly	Surface finish, markings, coating	No defects, proper identification
Actuator	Housing integrity, nameplate	Proper ratings, no damage
Electrical Connections	Cable entries, terminal blocks	Proper sealing, secure connections
Mechanical Assembly	Mounting bolts, coupling alignment	Proper torque, no misalignment
Paint/Coating	Uniformity, thickness	Per specification, no runs or sags

Stage 3: Dimensional Verification

• Face-to-face dimensions per ISO 5752
• Flange dimensions per specified standard
• Actuator mounting per ISO 5211
• Overall dimensions for shipping

Stage 4: Functional Testing

Mechanical Operation Test:

Test Procedure:

• Manual Operation: Verify handwheel operation
• Electric Operation: Full open/close cycles (3-5 times)
• Torque Verification: Confirm within actuator rating
• Speed Test: Verify opening/closing time
• Limit Switches: Test open/close position stops
• Electrical Testing:

Insulation resistance: >100MΩ at 500VDC

Dielectric strength: 1500VAC for 1 minute

Motor current: Within nameplate rating

Control functions: Test all modes (local/remote/auto)

1. Pressure Testing (Valve):

• Shell test: 1.5 × PN for ≥2 minutes
• Seat test: 1.1 × PN both directions
• Test medium: Water or air per API 598

Integrated Performance Test:

• End-to-end control signal test (4-20mA positioning)
• Fail-safe operation (if applicable)
• Communication protocol verification (if smart)
• Environmental simulation (if specified)

5.2 Special Considerations for Electric Actuators

Environmental Sealing Verification:

• IP67/IP68 submersion test (if specified)
• Conduit entry sealing check
• Housing gasket integrity

Explosion-Proof Requirements:

• Verify certification matches hazardous area classification
• Check flame path gaps
• Ensure proper cable gland certifications

Smart Features Verification:

• Communication protocol testing
• Diagnostic functions
• Configuration software operation

5.3 Export Preparation Checklist

Preservation:

• Internal drying after hydrotest
• Application of VCI (Vapor Corrosion Inhibitor) to metal surfaces
• Desiccant placement in actuator housing (if vented)
• Protective coating on machined surfaces

Protective Packaging:

• Individual Valve Protection:
• Flange face protection with 3mm plastic/metal covers
• Actuator shrouding with moisture barrier
• Valve disc secured in slightly open position

Crating Requirements:

• ISPM-15 compliant wood for international shipment
• Internal blocking and bracing
• Vibration dampening for sensitive components
• Separate packaging for accessories/ documentation

Marking and Labeling:

CRATE MARKING:

• Consignee/consignor details
• Handling instructions (fragile, keep dry, this side up)
• Package number and gross/net weight
• Hazard labels (if lithium batteries in actuators)

VALVE/ACTUATOR LABELING:

• Nameplate with all ratings
• Electrical classification labels
• Directional arrows
• Serial numbers for traceability

Documentation Package:

REQUIRED DOCUMENTS PER CONTAINER:

Commercial Documents:

• Commercial Invoice (3 copies)
• Packing List (detailed by crate)
• Certificate of Origin
• Bill of Lading

Technical Documents:

• Final Test Reports
• Material Certificates
• Certifications (ATEX, CE, etc.)
• Calibration Certificates
• Installation, Operation, Maintenance Manuals
• Spare Parts List

Shipping Documents:

• Insurance Certificate
• Export Declaration
• Dangerous Goods Declaration (if applicable)

Special Precautions for Electric Actuators:

Battery-Powered Units:

• Verify state of charge
• Include battery safety data sheets
• Comply with IATA/IMDG regulations if shipping separately

Electronic Components:

• ESD protection during handling
• Humidity indicators in packaging
• Temperature monitoring for extreme climates

Communication Modules:

• Configuration backup
• Default settings documentation
• Software version documentation

5.4 Third-Party Inspection Requirements

For critical applications, consider:

• Factory Acceptance Test (FAT) witness
• Third-party inspection (SGS, BV, DNV)
• Witnessed performance testing
• Random sampling for batch orders

FAT Checklist Example:

FACTORY ACCEPTANCE TEST PROTOCOL

• Document Review: Complete and approved
• Visual Inspection: Pass
• Dimensional Check: Within tolerance
• Pressure Tests: Shell/Seat passed
• Electrical Tests: All parameters OK
• Functional Tests: Full operation verified
• Control Tests: Signal response confirmed
• Safety Tests: All interlocks functional
• Packaging Inspection: Export ready

5.5 Final Release Criteria

Before shipping authorization:

All tests completed and documented

Non-conformities resolved and closed

Documentation package complete

Packaging meets export requirements

Shipping marks properly applied

Customs documentation prepared

Insurance arranged

Carrier instructions provided

5.6 Common Issues to Prevent

Issue	Prevention Measure
Moisture Damage	Desiccants, moisture barrier bags
Vibration Damage	Proper blocking and bracing
Electrical Damage	Surge protection during testing
Corrosion	Complete drying, VCI application
Documentation Errors	Cross-check against packing list

 By implementing this comprehensive inspection and preparation protocol, you ensure D941X electric actuated butterfly valves arrive at their destination fully functional and ready for installation, minimizing startup issues and ensuring long-term reliable operation.

Electric Actuated Flanged Butterfly Valve D941X Main dimensions(mm)

DN		50	65	80	100	125	150	200	250	300	350	400	450	500	600	700	800
L		108	112	114	127	140	140	152	165	178	190	216	222	229	267	292	318
D	PN10	165	185	200	220	250	285	340	395	445	505	585	615	670	780	895	1015
	PN16	165	185	200	220	250	285	340	405	460	520	580	640	715	840	910	1025
D1	PN10	125	145	160	180	210	240	295	350	400	460	515	565	620	725	840	950
	PN16	125	145	160	180	210	240	295	355	410	470	525	585	650	770	840	950
n-Фd	PN10	4-19	4-19	4-19	8-19	8-19	8-19	8-23	8-23	12-23	12-23	16-28	20-28	20-28	20-31	24-31	24-34
	PN16	4-19	4-19	4-19	8-19	8-19	8-23	12-23	12-28	12-28	16-28	16-31	20-31	20-34	20-37	24-37	24-40
Model of electric actuator		Q10	Q10	Q30	Q30	Q30	Q60	Q60	Q60	Q120	Q120	Q200	Q200	Q200	Q500	Q500	Q500

Note:1. Other specifications and flange standards are available upon request.

2. Design and specifications are subject to change without prior notice.