Patent #7,527,493

Industry Proven

MDP^™ Performance Non-Return Valve

Patented Low Pressure Drop Design

Works with All Polymer Types

6-7 Year Extended Wear Life

Quick Precise Shut-Off

Lowest Part Weight Distribution

Proven Material Savings

DON'T JUST TAKE OUR WORD WATCH TO SEE HOW IT WORKS

Technical Specifications at a Glance

Property

Value

Size Range

14-260mm diameter

Design

Low pressure drop design

Polymer Compatibility

All types including CPVC to LCP, filled and unfilled

Hydraulic Design

Optimized for polymers 10k to 100k more viscous than water

Retainer Pin Material

Tungsten Carbide (WC)

Ring Material

Tool Steel

Wear Protection

Abrasive, Adhesive and Corrosive wear protection

Patent Number

#7,527,493

Country of Origin

🇺🇸 United States

Why MDP™ Performance Non-Return Valve?

Screw tips (aka Non-Return Valves) are a vital component to the injection molding process. If they don’t shut-off fast and hold tight, then it’s all but impossible to maintain a robust process.

If you've been in the industry long enough, you know that NRVs contribute to part rejects due to inconsistent shut-off performance and or alter your process strategy by having to use excessive melt decompression to get them to work. Most industry experts agree, yet the same 60 year old OEM sliding ring designs are used throughout the world.

There is hope however because Md Plastics has an improved hydraulic design. Our MDP™ Performance Sliding Ring Non-Return Valve is used throughout the world by injection molders and specified by several molding machine manufacturers. Some of its benefits include:

Precise, ultra-quick shut-off
Ability to maintain shut-off through the full stroke of the screw
Extremely low pressure drop
Ability to be used with any resin
Shut-off performance with or without melt decompression

Robust molding processes demand the highest level of performance from your non-return valves. So demand the very best, demand an MDP™ Performance NRV.

Engineered for Superior Performance

The MDP™ Performance Non-Return Valve delivers unmatched reliability and efficiency for injection molding operations worldwide.

Low Pressure Drop

Patented hydraulic design features the lowest pressure drop in the industry, improving overall system efficiency and reducing energy consumption while maintaining optimal flow characteristics.

Precise Shutoff Control

Delivers exceptional shutoff performance with low part weight variance, ensuring consistent shot-to-shot quality without requiring melt decompression assistance for optimal operation.

Universal Polymer Compatibility

Works seamlessly with all polymer types from CPVC to LCP, including filled and unfilled materials, making it the perfect solution for diverse manufacturing requirements.

Extended Service Life

Tungsten carbide retainer pin and tool steel ring construction provide exceptional wear resistance, delivering 6-7 years of reliable service life in demanding applications.

Easy Implementation

Simple three-step process: request quote, install valve, and immediately start saving time, money, and materials with minimal disruption to existing operations.

Proven Reliability

Trusted by injection molders and machine OEMs worldwide, the patented design eliminates common valve problems while ensuring consistent performance across all application scenarios.

Frequently Asked Questions

What makes the MDP™ valve different from standard non-return valves?

The MDP^™ valve features a patented hydraulic design with the lowest pressure drop in the industry, eliminating the need for melt decompression while providing superior shutoff performance and extended wear life of 6-7 years.

Can the MDP™ valve work with all polymer types?

Yes, the MDP^™ valve is compatible with all resin groups including CPVC to LCP, both filled and unfilled polymers, making it suitable for any injection molding application regardless of material choice.

What size ranges are available for the MDP™ valve?

The MDP^™ Performance Non-Return Valve is available in all sizes from 14mm to 260mm diameter, accommodating virtually any injection molding machine configuration and application requirement.

How long does installation and implementation typically take?

Implementation follows a simple three-step process: request quote, install valve, and start saving. Installation is straightforward and can typically be completed during routine maintenance with minimal production downtime.

Is custom design consultation available for specific machine configurations?

Yes, owner Mike Durina provides personalized custom design consultation for specific machine makes and models, ensuring optimal valve configuration and performance for your unique application requirements.

Industries We Serve

Serving diverse sectors with specialized plasticating solutions for enhanced manufacturing performance.

Automotive

Precision plasticating solutions for high-quality automotive components requiring consistent melt quality and performance.

Medical Devices

Advanced plasticating technology ensuring purity and precision for critical medical device manufacturing applications.

Consumer Electronics

Innovative solutions for complex electronic housings and components requiring superior surface finish and dimensional accuracy.

Additive Manufacturing

Specialized plasticating systems for 3D printing and additive manufacturing, delivering consistent filament quality and material flow.

Plastic Processing

Comprehensive plasticating solutions for general plastic processing applications across various manufacturing sectors.