DN300 Medium Hydraulic Jaw Gripper Clamping Valve Test Bench

Integrated mature hydraulic system with strong clamping force, no displacement or pressure leakage during testing, ideal for large-size knife gate and butterfly valves Wide adjustable pressure range, maximum test pressure and clamping stroke can be customized to match various specifications of butterfly valves and knife gate valves Compliant with GB & API international inspection standards, widely used for factory outgoing QC inspection of industrial butterfly valves and knife gate valves

● Applicable Valve Type: Straight-through flanged gate valve, ball valve, globe valve, check valve

● Clamping Method: Hydraulic claws clamp the back side of the valve flange, with adjustable clamping force and zero external force impact on the valve body

● Sealing Structure: End-face O-ring sealing, enabling intuitive observation of exact leakage positions

● Test Medium: Clean water, or 4–7 bar low-pressure gas (air or nitrogen)

● Available Test Items: 1.5× nominal pressure hydrostatic shell strength test; 1.1× nominal pressure high-pressure water seal test; 4–7 bar low-pressure air seal test

● Test Diameter Range: DN80–DN300 (3"–12"), refer to the pressure test range table for detailed limits

● Valve Face-to-Face Length: 203–750 mm

● Valve Flange Diameter: Φ190–520 mm

● Valve Flange Thickness: 20–83 mm

● Structural Features: The right workplate supports 90° flipping; the left moving frame can be adjusted horizontally

● Workplate Spacing: 250–1100 mm

● Clamping Cylinder: 3 × Φ140 mm

● Maximum Clamping Force: 100 tons

● Material & Craftsmanship:

Piston rod: 45# carbon steel, quenched & tempered treatment, chrome-plated surface.

Hydraulic cylinder: Seamless steel pipe.

Water/gas pipeline control valve: Self-developed soft-sealing needle valve, 45# steel (SUS304 stainless steel optional).

Hydraulic manifold block: Pickled and decontaminated.

Hydraulic & water pipelines: 20# seamless steel pipe, pickled and decontaminated (SUS304 stainless steel optional).

Core Features

The DN300 Medium Hydraulic Jaw Gripper Clamping Valve Test Bench adopts an integrated mature hydraulic system that delivers a strong and stable clamping force, with no displacement or pressure leakage during testing.

It is equipped with multiple high-precision pressure gauges, supporting precise pressure regulation and stable long-time pressure holding.

Features a centralized button control panel with digital display, easy and safe for operators to use..

Uses standard universal hydraulic and electrical components, convenient for daily maintenance and spare parts replacement.

Full OEM/ODM customization service is available for test pressure, clamping dimensions and control system.

Application Scenarios

Factory Acceptance Test (FAT) for valve manufacturers

Incoming Quality Control (IQC) for large industrial end-users

District heating networks

Oil & gas industry

Mining & metallurgy

MRO workshops

Third-party testing agencies

Technical Parameter Tables

Pressure Test Range Table

Frequently Asked Questions

Q1: Are you a trading company or a manufacturer?

A1: We are Wenzhou Yufeng Valve Machinery Manufacturer, a direct factory specializing in the R&D and production of industrial valve test benches including the DN300 Medium Hydraulic Jaw Gripper Clamping Valve Test Bench.

Q2: What is your MOQ?

A2: Our MOQ is just 1 set. We highly welcome small trial orders as well as bulk procurement for large B2B projects.

Q3: What quality certifications do your valve test benches have?

A3: Quality is our core advantage. Our equipment including the DN300 Medium Hydraulic Jaw Gripper Clamping Valve Test Bench has passed strict API, GB, ISO, and CE certifications, ensuring full compliance with global industrial standards.

Q4: Can your equipment test GOST (Russian standard) valves?

A4: Absolutely. Thanks to our extensive experience in Russia and Central Asia, our machines are fully compatible with GOST standards, as well as standard API, DIN, and GB valves.

Q5: Do you support OEM/ODM customized services?

A5: Yes, we provide tailored solutions. We can customize the maximum test pressure, clamping dimensions, and control systems based on your specific valve types.

Q6: What is the standard lead time for an order?

A6: For standard testing machines, the lead time is typically 21 – 30 days. Customized valve test benches may take 30 – 35 days, depending on the design complexity.

Q7: What payment terms do you usually accept?

A7: We usually accept T/T in advance, Visa, and Western Union with a 30% deposit and 70% balance before shipment. L/C at sight is also acceptable for larger corporate orders.

Q8: How do you pack the equipment for international shipping?

A8: We use robust, fumigation-free export standard wooden cases with inner moisture-proof wrapping. This ensures the equipment remains intact during long-distance rail or sea freight to your factory.

Q9: How do we install and operate the valve test bench upon receiving it?

A9: Our machines are delivered nearly fully assembled. We provide detailed operation manuals and step-by-step video tutorials. Our technical team is also available online to guide your operators.

Q10: What is the warranty policy for your products?

A10: We offer a 24-month standard warranty starting from the delivery date. Even after the warranty expires, we provide lifelong technical support and supply spare parts freely.

Q11: How to start our first business and get an accurate quotation quickly from your side?

A11: Please share your specific valve details: valve type, size range (DN), maximum test pressure (PN), and connection ends. Our engineers will send a precise technical proposal within 24 hours.

Q12: Are you sure to replace new parts freely, and is it easy to find if something breaks?

A12: Sure! We use standard, internationally recognized hydraulic and electrical components for long service life. Located in "The Pumps and Valves Capital of China," we can deliver spare parts quickly via international express.