Relief Valves
Series 100 – Cartridge Relief Valves
Used for liquid or air, our relief valves can be incorporated into virtually any mounting design and are easily inserted into fittings, manifolds, or installed in-line.
Recently introduced, the patented Model 101 Micro Barbed Relief Valve is the smallest of its kind and is ideal for medical applications that incorporate tubing. The unique patented design features a spring-loaded poppet with a silicon ball seal and is available in a choice of opening pressures from 2 PSI to 20 PSI.
An extensive off-the-shelf, mix-and-match capability provides you with a wide range of product possibilities for designing a “custom” check valve – without a custom price. Smart Products relief valve options include:
- Standard, barbed, NPT, side seal, or micro barbed styles
- Wide range of plastic, o-ring, and spring materials
- Choice of precision opening pressures
Need a sample or have a question? Call (800) 338-0404 or simply fill out our contact form with your technical requirements.
Refer to the 
Materials Selection Chart for standard spring rates and materials. Other spring opening pressures and materials available by special order.
#110 |
#120 |
#130 |
#140 |
#150 |
#160 |
#170 |
#174 |
#101 |
#111 |
#118 |
#103 |
#109 |
#122 |
#132 |
#13a |
#14c |
#15b |
#157 |
| Standard | ||
|---|---|---|
| Model # | Size O.D. | Length |
| 110 | 1/4" (6.35mm) | .500" (12.70mm) |
| 120 | 5/16" (7.94mm) | .500" (12.70mm) |
| 130 | 3/8" (9.53mm) | .640" (16.26mm) |
| 140 | 1/2" (12.70mm) | .625" (15.88mm) |
| 150 | 5/8" (15.88mm) | .630" (16.00mm) |
| 160 | 5/8" (15.88mm) | .630" (16.00mm) |
| 170 | 3/4" (19.05mm) | 1.125" (28.58mm) |
| 174 | 3/4" (19.05mm) | .835" (21.21mm) |
| Micro Barbed | ||
|---|---|---|
| Model # | Fits Tubing I.D. | Length |
| 101 | 1/8" (4.57mm) | .375" (9.53mm) |
| Barbed | ||
|---|---|---|
| Model # | Fits Tubing I.D. | Length |
| 111 | 1/4" (6.35mm) | .475" (12.07mm) |
| 118 | (#111 in Reverse Flow) | |
| 1/8" NPT | ||
|---|---|---|
| Model # | NPT Size | Length |
| 103 | .438" (11.13mm) | .590" (14.99mm) |
| 109 | (#103 in Reverse Flow) | |
| Side Seal | ||
|---|---|---|
| Model # | Description | Size O.D. x Length |
| 122 | 5/16” Side Seal | .305” (7.747mm) x .5” (12.7mm) |
| 132 | 3/8” Side Seal | .365” (9.27mm) x .392” (9.96mm) |
| Flanged | ||
|---|---|---|
| Model # | Description | Body O.D. x Length (Flange O.D.) |
| 13a | 3/8" Flanged Inlet | .375" (9.53mm) x .640" (16.26mm) (.42", 10.668mm) |
| 14c | 1/2" Tapered Flanged Inlet | .50" (12.70mm) x .69" (17.526mm) (.62", 15.748mm) |
| 15b | 5/8" Flanged Outlet | .625" (15.88mm) x .58" (14.732mm) (.685", 17.399) |
| Manual Relief Bleed Valve - Control Valve | ||
|---|---|---|
| Model # | Control Valve | |
| 157 | 5/8" Manual Relief Bleed Valve | |
View Materials Selection Chart
Materials recommendations are based on standard corrosion resistant and compatibility guides. In a continuing pledge to provide customers with quality products, Smart Products requires that products are customer-tested and approved for each application-specific use.
For expert technical assistance or to order a sample…
CALL NOW!
(800) 338-0404
Check Valves
Pressure Relief Valves
Series 100 - Relief Valve
Control Valves
Check Valves Resources
Key Features:
- Used for liquid or air.
- Available in standard, barbed, NPT, side seal, flanged, and micro barbed styles.
- Chose from a wide range of plastic, o-ring, and spring options.
- Build your own custom check valve by mixing and matching our standard components and materials.
- Model 101 is the smallest of its kind and features newly patented technology.