check valves

Check valves (also called non-return valve, one-way valve) are used to allow the flow of fluid in only one direction. They prevent the flow of fluid in the other direction.  Check valves work automatically and do not need to be operated. Most... Read more Read more

Product Brand Connection size Material Seal material Valve shape Min pressure difference (bar) Connection type Article compression class Kv value (m3/h) Max pressure at 20 °C (bar) Min temperature (°C) Max temperature (°C) With lock spring With balance weight Surface protection Valve bore (mm) Model Height (mm) Width (mm) With strainer basket Material quality
G1/4'' check valve...
£5.85 (£4.84 excl vat)
In stock
AZ Pneumatics 1/4 inch Brass FKM (FPM) Inline spring closed 0.1 Inner thread cylindrical... PN 10 0.82 10 0 110 Yes No Untreated 7 Straight 34 13 - -
G1/2'' Brass Check Valve...
£7.69 (£6.36 excl vat)
In stock
Tameson 1/2 inch Brass NBR (nitrile rubber) Inline spring closed 0.02 Inner thread cylindrical... PN 12 4.22 12 -20 100 Yes No Untreated - Straight 47 34.5 - -
G1/8'' check valve...
£4.70 (£3.89 excl vat)
In stock
AZ Pneumatics 1/8 inch Brass FKM (FPM) Inline spring closed 0.1 Inner thread cylindrical... PN 10 0.45 10 0 110 Yes No Untreated 5.2 Straight 39 16 - -
G1'' Brass Check Valve NBR...
£12.29 (£10.16 excl vat)
In stock
Tameson 1 inch Brass NBR (nitrile rubber) Inline spring closed 0.02 Inner thread cylindrical... PN 12 11.67 12 -20 100 Yes No Untreated - Straight 60.5 47.5 - -
G1'' Brass Foot Valve NBR...
£15.78 (£13.04 excl vat)
In stock
Tameson 1 inch Brass NBR (nitrile rubber) Inline spring closed 0.02 Inner thread cylindrical... - - - -20 60 - - - - - - - Yes -
G3/4'' Brass Check Valve...
£9.87 (£8.16 excl vat)
In stock
Tameson 3/4 inch Brass NBR (nitrile rubber) Inline spring closed 0.02 Inner thread cylindrical... PN 12 7.92 12 -20 100 Yes No Untreated - Straight 53 42 - -
G1/2'' Stainless Steel 304...
£34.59 (£28.59 excl vat)
In stock
Tameson 1/2 inch Stainless steel FKM (FPM) Inline spring closed 0.25 Inner thread cylindrical... PN 16 - 16 -20 150 Yes No Untreated - Straight 32 66 - Stainless steel 304 (1.4301)
G1/2'' Brass Foot Valve NBR...
£9.79 (£8.09 excl vat)
In stock
Tameson 1/2 inch Brass NBR (nitrile rubber) Inline spring closed 0.02 Inner thread cylindrical... - - - -20 60 - - - - - - - Yes -
G1'' Stainless Steel 304...
In stock
Tameson 1 inch Stainless steel FKM (FPM) Inline spring closed 0.35 Inner thread cylindrical... PN 16 - 16 -20 150 Yes No Untreated - Straight 55 83 - Stainless steel 304 (1.4301)
G3/8'' Brass Check Valve...
£8.26 (£6.83 excl vat)
In stock
Tameson 3/8 inch Brass NBR (nitrile rubber) Inline spring closed 0.02 Inner thread cylindrical... PN 12 2.11 12 -20 100 Yes No Untreated - Straight 46.5 34.5 - -
G3/4'' Stainless Steel 304...
£34.47 (£28.49 excl vat)
In stock
Tameson 3/4 inch Stainless steel FKM (FPM) Inline spring closed 0.35 Inner thread cylindrical... PN 16 - 16 -20 150 Yes No Untreated - Straight 45 72 - Stainless steel 304 (1.4301)
G3/8'' Stainless Steel 304...
£29.88 (£24.69 excl vat)
In stock
Tameson 3/8 inch Stainless steel FKM (FPM) Inline spring closed 0.25 Inner thread cylindrical... PN 16 - 16 -20 150 Yes No Untreated - Straight 32 66 - Stainless steel 304 (1.4301)
G1'' Stainless Steel 316 Y...
In stock
Tameson 1 inch Stainless steel Teflon (PTFE) Angle seat spring closed 0.4 Inner thread cylindrical... PN 40 - 40 -20 200 Yes No Untreated 22.5 Straight 75 90 - Stainless steel 316 (1.4408)
G1-1/4'' Brass Check Valve...
£19.42 (£16.05 excl vat)
In stock
Tameson 1 1/4 inch Brass NBR (nitrile rubber) Inline spring closed 0.02 Inner thread cylindrical... PN 10 22.42 10 -20 100 Yes No Untreated - Straight 66.5 59.5 - -
G1-1/2'' Brass Check Valve...
£31.60 (£26.12 excl vat)
In stock
Tameson 1 1/2 inch Brass NBR (nitrile rubber) Inline spring closed 0.02 Inner thread cylindrical... PN 10 29.39 10 -20 100 Yes No Untreated - Straight 74 70.5 - -
check valves

check valves

Check valves (also called non-return valve, one-way valve) are used to allow the flow of fluid in only one direction. They prevent the flow of fluid in the other direction.  Check valves work automatically and do not need to be operated. Most available types have a small spring to close the valve, the medium pressure in the forward direction opens the valve. Note that there is a minimum pressure required to open the valve (usually called cracking pressure).