DN700 Dual Station Special Hydraulic Test Bench for Butterfly Valves

Equipped with two fully independent hydraulic clamping stations, this DN700 Dual Station Special Hydraulic Test Bench for Butterfly Valves can run tests on two workpieces simultaneously or separately without mutual interference, perfectly adapting to wafer-type and flange-connected butterfly valves of various specifications. Custom end-face sealing tooling exclusive for butterfly valves is matched together with independent constant pressure control system, which can complete shell strength test and bidirectional seat tightness long-time pressure holding leakage inspection fully in accordance with GB/T13927-2022 and API 598 international valve testing standards.

The bench supports water-air dual test media switching, high-precision pressure recording and built-in hydraulic self-locking safety protection interlock system. Compared with single-station testing machines, its dual-station layout greatly boosts batch inspection efficiency; uniform clamping force eliminates the long-standing leakage defect of butterfly valve end-face sealing during pressure testing. It is the ideal dedicated inspection equipment for mass production quality control of butterfly valves and knife gate valve production lines.

Basic standard parameters: applicable caliber DN50~DN700, overall dimension 3500×1400×1700mm, total weight 6 tons, rated power 6.5KW. Clamping tonnage, maximum test pressure and station spacing can be customized according to customer production demands. We provide CE certification renovation, multi-language touch panel and 415V export voltage adaptation services for overseas valve manufacturers.

Seven Core Differentiated Advantages

1.Fully Independent Dual Station Parallel Operation Design The core competitive advantage of DN700 Dual Station Special Hydraulic Test Bench for Butterfly Valves: two completely separated hydraulic systems and control loops for left & right stations; operators can test two valves of different types/calibers at the same time, no waiting downtime, production inspection efficiency nearly doubled compared with single-station models.

2.Exclusive End-face Sealing Tooling for Butterfly Valves Specially customized sealing fixture structure aiming at the structural characteristics of wafer butterfly valves and flange butterfly valves; stress is evenly distributed on valve flange end face, effectively solving the difficult problem of unstable end-face sealing and medium leakage easily occurring during bidirectional tightness test.

3.Independent Constant Pressure Control System for Each Station Each worktable is equipped with an independent pressure regulating and holding unit; pressure parameters can be set separately for two stations, suitable for mixed production inspection of various valves with different pressure grades, flexible and highly adaptable.

4.Water & Air Dual Medium Closed-loop Circulation Pressure System Separate water filling pipeline and air pressurization pipeline are arranged; water for shell hydrostatic strength test, compressed air for bidirectional tightness leakage detection. PLC constant pressure system automatically compensates pressure loss, pressure control accuracy ≤±1%, meets multi-stage pressure holding requirements of API 598 standard.

5.Integral Welded Heavy-duty Base Frame With Stress Relief Treatment Whole bed frame is made of thick steel plate one-piece welding plus stress relief annealing treatment, total bearing capacity reaches 6 tons; long-term continuous batch heavy-load operation without frame deformation or vibration, stable clamping benchmark all the time.

6.Multi-layer Hydraulic Self-locking Safety Interlock Protection Mechanism Built-in hydraulic clamping overpressure self-lock, test pressure over-limit automatic relief, station stroke limit anti-collision, emergency stop power-off four-fold safety interlock. Once abnormal situation occurs, all hydraulic output will be cut off instantly, complying with EU CE industrial machinery safety specifications.

7.Reserved Digital Intelligent Upgrade Expansion Interface Main control cabinet reserves industrial communication port, customers can later retrofit touch screen automatic testing program, pressure curve storage, electronic inspection report export and MES system docking functions to realize full digital traceability of batch inspection data.

Complete Technical Parameter Table

Seven Target Application Scenarios

1.Large-scale Butterfly Valve Mass Production Factories: Synchronous offline batch delivery inspection of two groups of industrial valves on production lines.

2.Municipal Water Supply & Drainage Pipeline Supporting Manufacturers: Bidirectional tightness test of large-caliber pipeline butterfly valves.

3.Petrochemical Process Pipeline Equipment Plants: Pressure performance verification of regulating butterfly valves for medium pipelines.

4.Central Heating & HVAC System Manufacturers: Periodic re-inspection of heating pipeline butterfly valves and knife gate valves.

5.Professional Valve Maintenance Service Station: Post-renovation performance retest for recycled used butterfly valves.

6.Overseas Medium-sized Valve Assembly EPC Factory: High-efficiency dual-station multi-purpose valve testing equipment with complete CE export certification documents.

7.Valve Sealing Structure R&D Laboratory: Comparative fatigue pressure test for new butterfly valve prototypes under bidirectional pressure conditions.

Pre-sales, In-sales & After-sales Global Integrated Service System

Pre-sales Customized Technical Support

Professional valve testing engineers conduct one-on-one technical communication, confirm valve types, caliber range, maximum test pressure and personalized functional requirements; provide equipment layout drawing and free valve sample pressure testing verification service, issue targeted customized testing scheme and formal quotation within 24 working hours.

In-sales Production & Export Shipment Service

Whole production progress tracked by real-time video; full-load continuous pressure cycle test completed before delivery with original test records archived. Export version adopts extra thick solid wood frame + steel belt shockproof & moisture-proof reinforced packaging; hydraulic schematic, electrical wiring drawing, multilingual operation manual and full set of customs clearance certification documents are delivered together with the machine.

After-sales Global Quality Assurance Service

Independent hydraulic cylinders, pressure booster pumps, PLC controllers and pressure sensors enjoy 24-month global warranty; free replacement of non-artificial damaged spare parts within warranty period. We provide remote online parameter debugging, complete operation video tutorials, coordinate local overseas agents for on-site installation, commissioning and maintenance; lifelong supply of general hydraulic spare parts and free long-term valve pressure testing technical consultation.

FAQ & Official Purchase Guidance

Frequently Asked Questions

Q1: Can two stations test different types and sizes of butterfly valves at the same time? 

A1: The two stations adopt fully independent hydraulic and control systems, pressure parameters and clamping strokes can be adjusted separately, which can realize mixed testing of butterfly valves with different calibers at the same time, greatly improving production flexibility.

Q2: Why is exclusive tooling needed for butterfly valve testing? 

A2: Butterfly valves need bidirectional sealing test; ordinary general tooling is easy to cause end-face pressure deviation and leakage. Our customized sealing fixture fits the valve structure perfectly to ensure stable sealing effect during bidirectional pressure holding.

Q3: Can automatic pressure recording and electronic report function be upgraded later? 

A3: The control system reserves digital expansion interface at factory, all intelligent functional modules can be retrofitted after equipment purchase.

Q4: Is CE certification available for overseas export trade? 

A4: We can complete full CE industrial machinery safety transformation, configure multi-language operation panel and 415V export voltage, provide complete CE certification documents for customs clearance and overseas project acceptance audit.

Q5: What is the standard production delivery cycle? 

A5: Standard configuration delivery cycle: 32 working days; customized ultra-high pressure intelligent version delivery cycle: 38 working days.

Purchase Guidance

Please send detailed information including applicable valve types, caliber scope, maximum test pressure and export certification demands to our engineering team. We will formulate a complete high-efficiency dual-station butterfly valve dedicated pressure testing solution and preferential bulk procurement quotation within 24 hours, supporting annual framework cooperation orders for mass production valve manufacturers and global water conservancy, pipeline EPC supporting projects.