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300 Series, Noiseless
Rubber Poppet

Strataflo 300 Series check valves contain a rubber poppet, designed for noiseless operation. The rubber poppets are fully-formed around a solid steel insert. Varying types of rubber can be used, depending on the application. This is the most durable poppet solution available in the market. We do not use O-Rings.

The one-piece body is cast brass. A sensitive spring allows this valve to be used in any position. Cracking pressure is approximately 1 lb., not adjustable. Other cracking pressure available. Working pressure 400 lbs. Maximum temperature of 225°F.

 

 

 

 

 

To purchase with the break-away plug option, please add “-PLG” to the part number.

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No. 300: Buna-S Rubber Poppet for General Purpose Applications

The No. 300 contains a silicone treated Buna-S rubber poppet on a stainless steel stem, designed to open easily and be more durable than O-rings. Being flexible, they cannot leak. Used as an all purpose check valve for multiple applications, including cold water, ethylene and glycol.

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300 Series Pricing Information
3/8" 1/2" 3/4" 1" 1-1/4" 1-1/2" 2" 2-1/2" 3"F * 3"M ** 4"
$29.72 $29.72 $28.24 $37.68 $44.08 $57.96 $90.70 $206.00 $420.48 $224.32 $703.90

* New valve: Standard female threads on both ends, Cv Factor of 185
** Original valve: 2-1/2" valve body with 3" male threads, Cv Factor of 69
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No. 325: Buna-S Rubber Poppet for Submersible Pumps

The No. 325 is similar in design to the No. 300 Check Valve but it is furnished with a male thread on the lower (inlet) end, for attaching directly to the pump. Furnished only in the thread sizes and combinations specified below.

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325 Series Specifications & Pricing Information
Pipe Size Outlet Pipe Size
Inlet
325 Series Part# Overall Length Valve
Diameter
Valve
Weight
Flow Factor
CV
Price
1" 1-1/4" 325-100 3.69 2.00" 1.25 lb 8 $37.68
1-1/4" 1-1/4" 325-125 4.56 2.00" 1.95 lb 14 $44.08
2" 2" 325-200 5.57 3.34 3.45 lb 52 $90.70


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No. 375: Buna-N Rubber Poppet for Gas and Oil Applications

The Buna-N rubber poppet is molded to a stainless steel stem, with all other internal parts also made of stainless steel. Used for gas and oil applications, including gasoline, hydraulic fluids, diesel fuel, alcohol, kerosene, and mineral oil.

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375 Series Pricing Information
3/8" 1/2" 3/4" 1" 1-1/4" 1-1/2" 2" 2-1/2" 3"F * 3"M ** 4"
$29.72 $29.72 $29.90 $40.26 $48.12 $66.66 $103.41 $218.26 $420.48 $236.40 $703.90

* New valve: Standard female threads on both ends, Cv Factor of 185
** Original valve: 2-1/2" valve body with 3" male threads, Cv Factor of 69
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No. 385: EPD Rubber Poppet for Chemical and Detergent Applications

An EPD poppet is attached to a stainless steel stem, with all other internal parts also made of stainless steel. Used for chemical and detergent applications, also including animal and vegetable oils, brake fluid, ketones, ozone & oxidizing chemicals, ammonia, and salt water.

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385 Series Pricing Information
3/8" 1/2" 3/4" 1" 1-1/4" 1-1/2" 2" 2-1/2" 3"F * 3"M ** 4"
$29.72 $29.72 $30.48 $39.34 $48.12 $66.66 $103.41 $218.26 $420.48 $236.40 $703.90

* New valve: Standard female threads on both ends, Cv Factor of 185
** Original valve: 2-1/2" valve body with 3" male threads, Cv Factor of 69
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No. 395: Viton Rubber Poppet for Higher Temps, Fuels, Oils, & Chemicals

A Viton poppet is attached to a stainless steel stem, with all other internal parts also made of stainless steel. Used for higher temperature applications, providing excellent resistance to fuels and chemicals. Also designed for use in food and beverage applications with the No. 2395. Maximum operating temperature of 350°F. Not for steam use.

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395 Series Pricing Information
3/8" 1/2" 3/4" 1" 1-1/4" 1-1/2" 2" 2-1/2" 3"F * 3"M ** 4"
$30.72 $30.72 $34.02 $47.20 $55.54 $68.76 $103.44 $242.00 $456.48 $260.00 $703.90

* New valve: Standard female threads on both ends, Cv Factor of 185
** Original valve: 2-1/2" valve body with 3" male threads, Cv Factor of 69
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No. F300: Lead-Free Series

NSF logoNow offering our same high quality valves with lead-free materials, certified by NSF to contain less than 0.25% lead by weighted average. The lead-free series is compliant with CA, LA, MD, VT state laws and U.S. Safe Water Drinking Act. The lead-free line comes standard with a Buna-S rubber poppet, an extremely durable compound for use with potable drinking water. All other internal components of stainless steel. Optional rubber poppets are available in Buna-N and EPD upon request.

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300 F-Series (Lead-Free) Pricing Information
1/2" 3/4" 1" 1-1/4" 1-1/2" 2" 2-1/2" 3"F * 3"M ** 4"
$33.64 $32.82 $44.76 $50.98 $70.58 $111.98 $233.10 $470.48 $251.42 $778.50

* New valve: Standard female threads on both ends, Cv Factor of 185
** Original valve: 2-1/2" valve body with 3" male threads, Cv Factor of 69
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300 Series Specifications
Pipe
Size
300
Series
Part #
375
Series
Part #
385
Series
Part #
395
Series
Part #
Overall Length Valve
Diameter
Valve
Weight
Flow
Factor
CV
3/8" 300-038 375-038 385-038 395-038 2.63" 1.16" 0.50 lb 2
1/2" 300-050 375-050 385-050 395-050 2.69" 1.40" 0.60 lb 3
3/4" 300-075 375-075 385-075 395-075 3.31" 1.62" 0.90 lb 5
1" 300-100 375-100 385-100 395-100 3.69" 2.00" 1.25 lb 8
1-1/4" 300-125 375-125 385-125 395-125 4.57" 2.41" 2.00 lb 17
1-1/2" 300-150 375-150 385-150 395-150 4.88" 2.69" 2.45 lb 32
2" 300-200 375-200 385-200 395-200 5.56" 3.34" 3.90 lb 52
2-1/2" 300-250 375-250 385-250 395-250 6.79" 3.81" 7.15 lb 69
*3" 300-300-F 375-300-F 385-300-F 395-300-F 7.40" 4.71" 11.80 lb 185
**3" 300-300 375-300 385-300 395-300 6.79" 3.81" 6.60 lb 69
4" 300-400 375-400 385-400 395-400 10.00" 5.80" 21.70 lb 240
3"-FLG                
4"-FLG                

* New valve: Standard female threads on both ends, Cv Factor of 185
** Original valve: 2-1/2" valve body with 3" male threads, Cv Factor of 69

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