Stock Items

Explore our high-performance non-return valve solutions engineered to enhance melt consistency, improve shot-to-shot repeatability, and reduce material leakage in injection molding applications. Designed for durability and precision, MDP™ Performance Non-Return Valves deliver superior sealing performance, faster recovery, and improved processing efficiency across a wide range of engineering and commodity resins. With optimized flow dynamics and wear-resistant construction, these valves help minimize downtime, extend screw life, and maximize overall machine performance.

Our Range of Products

ignoreGeneration#Posi-Shut™ Automatic Shut-Off Valve

MDP^™ Performance Non-Return Valve (Engel 45mm)

Engel 45mm

VEN1.772MDPII2024

4140 Alloy Steel Retainer, CPM-M4 Tool Steel Ring, D2 Tool Steel Rear Seat

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MDP^™ Performance Non-Return Valve (Ferromatik 65mm)

Ferromatik 65mm

VFM2.559MDPII2024

4141 Alloy Steel Retainer, CPM-M4 Tool Steel Ring, D2 Tool Steel Rear Seat

Learn More

MDP^™ Performance Non-Return Valve (Toshiba 40mm)

Toshiba 40mm

VTO1.575MDPII2024

4140 Alloy Steel Retainer, CPM-M4 Tool Steel Ring, D2 Tool Steel Rear Seat

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MDP^™ Performance Non-Return Valve (Engel 50mm)

Engel 50mm

VEN1.969MDPII2024

4140 Alloy Steel Retainer, CPM-M4 Tool Steel Ring, D2 Tool Steel Rear Seat

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MDP^™ Performance Non-Return Valve (Engel 35mm)

Engel 35mm

VEN1.378MDPII2024-16

4140 Alloy Steel Retainer, CPM-M4 Tool Steel Ring, D2 Tool Steel Rear Seat

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MDP^™ Performance Non-Return Valve (Engel 25mm)

Engel 25mm

VEN0.984MDPII2024

4140 Alloy Steel Retainer, CPM-M4 Tool Steel Ring, D2 Tool Steel Rear Seat

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MDP^™ Performance Non-Return Valve (Roboshot 22mm)

Roboshot 22mm

VCR0.866MDPII2024

4140 Alloy Steel Retainer, CPM-M4 Tool Steel Ring, D2 Tool Steel Rear Seat

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MDP^™ Performance Non-Return Valve (Ferromatik 100mm)

Ferromatik 100mm

VFM3.937MDPII2024

4140 Alloy Steel Retainer, CPM-M4 Tool Steel Ring, D2 Tool Steel Rear Seat

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MDP^™ Performance Non-Return Valve (Toshiba 32mm)

Toshiba 32mm

VTO1.260MDPII2024

4140 Alloy Steel Retainer, CPM-M4 Tool Steel Ring, D2 Tool Steel Rear Seat

Learn More

MDP^™ Performance Non-Return Valve (Engel 60mm)

Engel 60mm

VEN2.362MDPII2024

4140 Alloy Steel Retainer, CPM-M4 Tool Steel Ring, D2 Tool Steel Rear Seat

Learn More

MDP^™ Performance Non-Return Valve (Roboshot 28mm)

Roboshot 28mm

VCR1.102MDPII2024

4140 Alloy Steel Retainer, CPM-M4 Tool Steel Ring, D2 Tool Steel Rear Seat

Learn More

Showing 1 to 11 of 11 results

Frequently Asked Questions

What are stock items?

Stock items are MDP^™ Performance Non-Return Valves we keep on the shelf for popular machine makes and sizes, ready to ship quickly so you can minimize downtime and avoid long lead times.

Which machine makes and sizes are available from stock?

We stock MDP^™ Performance Non-Return Valves for common configurations including Engel 35mm, 45mm and 50mm, Ferromatik 65mm, and Toshiba 40mm. Contact us to confirm availability for your specific machine.

What makes the MDP^™ Non-Return Valve different?

Its patented hydraulic design delivers precise, ultra-quick shut-off, the lowest pressure drop in the industry, and shut-off performance with or without melt decompression — for a more robust, repeatable molding process.

How long do these valves last?

Built with a tungsten carbide retainer pin and tool steel ring, the MDP^™ valve provides 6-7 years of extended wear life, even in abrasive and corrosive processing environments.

Which resins are these valves compatible with?

The MDP^™ valve works with all polymer types from CPVC to LCP, including filled and unfilled materials, making it suitable for virtually any injection molding application.

How quickly can stock items ship?

Because stock items are kept on the shelf, they can be dispatched fast with worldwide shipping available — getting you back into production with minimal interruption.

What if my machine size isn't in stock?

If your configuration isn't on the shelf, we offer custom design support — including direct consultation with founder Mike Durina — to build the right valve for your machine make, model, and process.

Industries We Serve

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.

Didn't find what you're looking for?

Talk to our experts for custom plasticating solutions and tailored guidance.

Why Plastic Processors choose Md Plastics Inc

Patented Technologies

Nine award patents behind our MDP™ Performance Non-Return Valve design, delivering precise, ultra-quick shut-off and an extremely low pressure drop.

Technical Excellence

Over 45 years of expertise in plastic processing with engineering solutions that maximize productivity and reduce waste.

Ready to Ship

Popular MDP™ valve sizes kept on the shelf and dispatched fast with worldwide shipping, minimizing downtime and eliminating long manufacturing lead times.

Get In-Stock Components for Your Operation

Connect with our technical experts to find the right in-stock MDP™ Performance Non-Return Valve for your machine make, size, and processing requirements — ready to ship.

For immediate assistance, feel free to give us a direct call at +1-330-482-5100

Stock Items

Our Range of Products

MDP™ Performance Non-Return Valve (Engel 45mm)

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MDP™ Performance Non-Return Valve (Ferromatik 65mm)

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MDP™ Performance Non-Return Valve (Toshiba 40mm)

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MDP™ Performance Non-Return Valve (Engel 50mm)

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MDP™ Performance Non-Return Valve (Engel 35mm)

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MDP™ Performance Non-Return Valve (Engel 25mm)

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MDP™ Performance Non-Return Valve (Roboshot 22mm)

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MDP™ Performance Non-Return Valve (Ferromatik 100mm)

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MDP™ Performance Non-Return Valve (Toshiba 32mm)

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MDP™ Performance Non-Return Valve (Engel 60mm)

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MDP™ Performance Non-Return Valve (Roboshot 28mm)

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Frequently Asked Questions

What are stock items?

Stock items are MDP™ Performance Non-Return Valves we keep on the shelf for popular machine makes and sizes, ready to ship quickly so you can minimize downtime and avoid long lead times.

Which machine makes and sizes are available from stock?

We stock MDP™ Performance Non-Return Valves for common configurations including Engel 35mm, 45mm and 50mm, Ferromatik 65mm, and Toshiba 40mm. Contact us to confirm availability for your specific machine.

What makes the MDP™ Non-Return Valve different?

Its patented hydraulic design delivers precise, ultra-quick shut-off, the lowest pressure drop in the industry, and shut-off performance with or without melt decompression — for a more robust, repeatable molding process.

How long do these valves last?

Built with a tungsten carbide retainer pin and tool steel ring, the MDP™ valve provides 6-7 years of extended wear life, even in abrasive and corrosive processing environments.

Which resins are these valves compatible with?

The MDP™ valve works with all polymer types from CPVC to LCP, including filled and unfilled materials, making it suitable for virtually any injection molding application.

How quickly can stock items ship?

Because stock items are kept on the shelf, they can be dispatched fast with worldwide shipping available — getting you back into production with minimal interruption.

What if my machine size isn't in stock?

If your configuration isn't on the shelf, we offer custom design support — including direct consultation with founder Mike Durina — to build the right valve for your machine make, model, and process.

Industries We Serve

Automotive

Medical Devices

Consumer Electronics

Additive Manufacturing

Plastic Processing

Didn't find what you're looking for?

Why Plastic Processors choose Md Plastics Inc

Patented Technologies

Technical Excellence

Ready to Ship

Get In-Stock Components for Your Operation

Contact Us Today

Product Inquiry

MDP^™ Performance Non-Return Valve (Engel 45mm)

MDP^™ Performance Non-Return Valve (Ferromatik 65mm)

MDP^™ Performance Non-Return Valve (Toshiba 40mm)

MDP^™ Performance Non-Return Valve (Engel 50mm)

MDP^™ Performance Non-Return Valve (Engel 35mm)

MDP^™ Performance Non-Return Valve (Engel 25mm)

MDP^™ Performance Non-Return Valve (Roboshot 22mm)

MDP^™ Performance Non-Return Valve (Ferromatik 100mm)

MDP^™ Performance Non-Return Valve (Toshiba 32mm)

MDP^™ Performance Non-Return Valve (Engel 60mm)

MDP^™ Performance Non-Return Valve (Roboshot 28mm)

Stock items are MDP^™ Performance Non-Return Valves we keep on the shelf for popular machine makes and sizes, ready to ship quickly so you can minimize downtime and avoid long lead times.

We stock MDP^™ Performance Non-Return Valves for common configurations including Engel 35mm, 45mm and 50mm, Ferromatik 65mm, and Toshiba 40mm. Contact us to confirm availability for your specific machine.

What makes the MDP^™ Non-Return Valve different?

Built with a tungsten carbide retainer pin and tool steel ring, the MDP^™ valve provides 6-7 years of extended wear life, even in abrasive and corrosive processing environments.

The MDP^™ valve works with all polymer types from CPVC to LCP, including filled and unfilled materials, making it suitable for virtually any injection molding application.