Series 300 Modular Check Valves
Materials Guide Check Valve Operation View PDF Product Catalog Call now for expert technical assistance!

Series 300 - Modular Check Valves and
Pressure Relief Valves

Versatile! Interchangeable! Flexible Design! Our most popular series allows you to mix and match end fittings (barbed, NPT, and foot valve styles) to create the ideal valve for your low pressure, low flow project.  You may also use the same configuration on both ends.

Internally, this design incorporates check valve cartridge model #150 or #160 to eliminate leak prone adapter by combining end fittings and check valve into one part.

For pump applications, Model #315 (foot/filtering valve) is easily paired with any Series 300 end fitting.

At Smart Products, all of our valves are customizable by plastic body material, o-ring material, and opening spring pressure to meet a specific application criteria.

Model 300 Check Valve

Model #300

Barbed - 1/16"

Fits Tubing I.D.
1/16" (1.58mm)

Body Materials
Polypropylene, Nylon, PVDF, Ultem®, ABS

O-ring Materials
Buna-N, EPDM, Viton®, Silicone, Fluorosilicone, Aflas†, Kalrez®†

† Not available with springs less than 0.5 PSI

Spring Pressure
0.11 - 20 PSI

 


Model 303 Check Valve

Model #303

Barbed - 3/16"

Fits Tubing I.D.
3/16" (4.76mm)

Body Materials
Polypropylene, Nylon, PVDF, Ultem®, ABS, Radel®

O-ring Materials
Buna-N, EPDM, Viton®, Silicone, Fluorosilicone, Aflas†, Kalrez®†

† Not available with springs less than 0.5 PSI

Spring Pressure
0.11 - 20 PSI

 


Model 306 Check Valve

Model #306

Barbed - 3/8"

Fits Tubing I.D.
3/8 " (9.525mm)

Body Materials
Polypropylene, Nylon, PVDF, Ultem®, ABS

O-ring Materials
Buna-N, EPDM, Viton®, Silicone, Fluorosilicone, Aflas†, Kalrez®†

† Not available with springs less than 0.5 PSI

Spring Pressure
0.11 - 20 PSI

 


Model 314 Check Valve

Model #314

NPT - 1/8"

NPT Size
1/8"

Body Materials
Polypropylene, Nylon, PVDF, Ultem®, ABS, Radel®

O-ring Materials
Buna-N, EPDM, Viton®, Silicone, Fluorosilicone, Aflas†, Kalrez®†

† Not available with springs less than 0.5 PSI

Spring Pressure
0.11 - 20 PSI

 


Model 314 Check Valve

Model #361

Smooth Stem - 3/8"

Fits Tubing I.D.
3/8"

Body Materials
Polypropylene, Nylon, PVDF, Ultem®, ABS, Radel®

O-ring Materials
Buna-N, EPDM, Viton®, Silicone, Fluorosilicone, Aflas†, Kalrez®†

† Not available with springs less than 0.5 PSI

Spring Pressure
0.11 - 20 PSI

 


Model 301 Check Valve

Model #301

Barbed - 3/32"

Fits Tubing I.D.
3/32" (2.38mm)

Body Materials
Polypropylene, Nylon, PVDF, Ultem®, ABS

O-ring Materials
Buna-N, EPDM, Viton®, Silicone, Fluorosilicone, Aflas†, Kalrez®†

† Not available with springs less than 0.5 PSI

Spring Pressure
0.11 - 20 PSI

 


Model 304 Check Valve

Model #304

Barbed - 1/4"

Fits Tubing I.D.
1/4 " (6.35mm)

Body Materials
Polypropylene, Nylon, PVDF, Ultem®, ABS, Radel®

O-ring Materials
Buna-N, EPDM, Viton®, Silicone, Fluorosilicone, Aflas†, Kalrez®†

† Not available with springs less than 0.5 PSI

Spring Pressure
0.11 - 20 PSI

 


Model 308 Check Valve

Model #308

Barbed - 1/2"

Fits Tubing I.D.
1/2 " (12.70mm)

Body Materials
Polypropylene, Nylon, PVDF, Ultem®, ABS

O-ring Materials
Buna-N, EPDM, Viton®, Silicone, Fluorosilicone, Aflas†, Kalrez®†

† Not available with springs less than 0.5 PSI

Spring Pressure
0.11 - 20 PSI


Model 315 Check Valve

Model #315

Foot Valve

Body Materials
Polypropylene, Nylon, PVDF, Ultem®, ABS

O-ring Materials
Buna-N, EPDM, Viton®, Silicone, Fluorosilicone, Aflas†, Kalrez®†

† Not available with springs less than 0.5 PSI

Spring Pressure
0.11 - 20 PSI


Model 302 Check Valve

Model #302

Barbed - 1/8"

Fits Tubing I.D.
1/8" (3.18mm)

Body Materials
Polypropylene, Nylon, PVDF, Ultem®, ABS

O-ring Materials
Buna-N, EPDM, Viton®, Silicone, Fluorosilicone, Aflas†, Kalrez®†

† Not available with springs less than 0.5 PSI

Spring Pressure
0.11 - 20 PSI

 


Model 305 Check Valve

Model #305

Barbed - 5/16"

Fits Tubing I.D.
5/16" (7.94mm)

Body Materials
Polypropylene, Nylon, PVDF, Ultem®, ABS

O-ring Materials
Buna-N, EPDM, Viton®, Silicone, Fluorosilicone, Aflas†, Kalrez®†

† Not available with springs less than 0.5 PSI

Spring Pressure
0.11 - 20 PSI

 


Model 312 Check Valve

Model #312

NPT - 1/4"

NPT Size
1/4"

Body Materials
Polypropylene, Nylon, Ultem®, ABS

O-ring Materials
Buna-N, EPDM, Viton®, Silicone, Fluorosilicone, Aflas†, Kalrez®†

† Not available with springs less than 0.5 PSI

Spring Pressure
0.11 - 20 PSI

 


Model 330 Check Valve

Model #330

Manual Relief Control Valve

Body Materials
Polypropylene

O-ring Materials
Buna-N, EPDM, Viton®, Silicone, Fluorosilicone, Aflas, Kalrez®

Unique design provides pressure or vacuum relief at the touch of a button. Threaded for panel mounting; 5/8-18 thread pitch

 



Note: Dimensions on this page are based on Polypropylene material. These are typically held to a +/- 0.005" tolerance. Keep in mind different plastics have different shrink rates and may vary from these tolerances.

Our products are subject to continuous improvement. To achieve this goal, Smart Products reserves the right to change features, processes, materials, testing and other specifications as necessary. All plastic body material recommendations are based on standard corrosion resistant and compatibility guides. Smart Products strongly recommends that customers test products for each application-specific use.

Buyer is urged to test and investigate the compatibility of any substance used with our products prior to actual use. Seller will not be responsible for the failure of Buyer to thoroughly test and investigate the compatibility of the substances used with our products and the fitness of the products for its particular use or application.

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