Constant Flow Valves

Series FC maintain constant flow with inlet pressure changes from 15 to 120 psi (1 bar to 8 bar). Available in pipe sizes 1/4" through 1", with standard flow ranges from 1/4 gpm to 8 gpm, with larger sizes (up to 3" FNPT) and higher flow rates (up to 120 gpm) available by special order contact us for a quote. Valves are pre-set and tamper proof.

  • PVC body
  • EPDM seals
  • For corrosive and ultra-pure liquid applications
Stock Description Catalog Pg. Price
1/4" FNPT PVC Constant Flow Valve with EPDM Seals- 1/4 GPM
88479
1/4" FNPT PVC Constant Flow Valve with EPDM Seals- 1/4 GPM
$109.88​/Each
Save 5%2+$104.38/Each
Save 10%4+$98.89/Each
Save 15%12+$93.39/Each
P-425
$109.88​/Each
In Stock
1/4" FNPT PVC Constant Flow Valve with EPDM Seals- 1/2 GPM
88480
1/4" FNPT PVC Constant Flow Valve with EPDM Seals- 1/2 GPM
$109.88​/Each
Save 5%2+$104.38/Each
Save 10%4+$98.89/Each
Save 15%12+$93.39/Each
P-425
$109.88​/Each
In Stock
1/4" FNPT PVC Constant Flow Valve with EPDM Seals- 3/4 GPM
88481
1/4" FNPT PVC Constant Flow Valve with EPDM Seals- 3/4 GPM
$109.88​/Each
Save 5%2+$104.38/Each
Save 10%4+$98.89/Each
Save 15%12+$93.39/Each
P-425
$109.88​/Each
In Stock
1/4" FNPT PVC Constant Flow Valve with EPDM Seals- 1 GPM
88482
1/4" FNPT PVC Constant Flow Valve with EPDM Seals- 1 GPM
$109.88​/Each
Save 5%2+$104.38/Each
Save 10%4+$98.89/Each
Save 15%12+$93.39/Each
P-425
$109.88​/Each
In Stock
1/4" FNPT PVC Constant Flow Valve with EPDM Seals- 1.5 GPM
88483
1/4" FNPT PVC Constant Flow Valve with EPDM Seals- 1.5 GPM
$109.88​/Each
Save 5%2+$104.38/Each
Save 10%4+$98.89/Each
Save 15%12+$93.39/Each
P-425
$109.88​/Each
In Stock
1/4" FNPT PVC Constant Flow Valve with EPDM Seals- 2 GPM
88484
1/4" FNPT PVC Constant Flow Valve with EPDM Seals- 2 GPM
$109.88​/Each
Save 5%2+$104.38/Each
Save 10%4+$98.89/Each
Save 15%12+$93.39/Each
P-425
$109.88​/Each
In Stock
3/8" FNPT PVC Constant Flow Valve with EPDM Seals- 1/4 GPM
88485
3/8" FNPT PVC Constant Flow Valve with EPDM Seals- 1/4 GPM
$124.20​/Each
Save 5%2+$117.99/Each
Save 10%4+$111.78/Each
Save 15%12+$105.57/Each
P-425
$124.20​/Each
In Stock
3/8" FNPT PVC Constant Flow Valve with EPDM Seals- 1/2 GPM
88486
3/8" FNPT PVC Constant Flow Valve with EPDM Seals- 1/2 GPM
$124.20​/Each
Save 5%2+$117.99/Each
Save 10%4+$111.78/Each
Save 15%12+$105.57/Each
P-425
$124.20​/Each
In Stock
3/8" FNPT PVC Constant Flow Valve with EPDM Seals - 3/4 GPM
88487
3/8" FNPT PVC Constant Flow Valve with EPDM Seals - 3/4 GPM
$124.20​/Each
Save 5%2+$117.99/Each
Save 10%4+$111.78/Each
Save 15%12+$105.57/Each
P-425
$124.20​/Each
In Stock
3/8" FNPT PVC Constant Flow Valve with EPDM Seals- 1 GPM
88488
3/8" FNPT PVC Constant Flow Valve with EPDM Seals- 1 GPM
$124.20​/Each
Save 5%2+$117.99/Each
Save 10%4+$111.78/Each
Save 15%12+$105.57/Each
P-425
$124.20​/Each
In Stock
3/8" FNPT PVC Constant Flow Valve with EPDM Seals- 1.5 GPM
88489
3/8" FNPT PVC Constant Flow Valve with EPDM Seals- 1.5 GPM
$124.20​/Each
Save 5%2+$117.99/Each
Save 10%4+$111.78/Each
Save 15%12+$105.57/Each
P-425
$124.20​/Each
In Stock
3/8" FNPT PVC Constant Flow Valve with EPDM Seals- 2 GPM
88490
3/8" FNPT PVC Constant Flow Valve with EPDM Seals- 2 GPM
$124.20​/Each
Save 5%2+$117.99/Each
Save 10%4+$111.78/Each
Save 15%12+$105.57/Each
P-425
$124.20​/Each
In Stock
1/2" FNPT PVC Constant Flow Valve with EPDM Seals- 1/4 GPM
88491
1/2" FNPT PVC Constant Flow Valve with EPDM Seals- 1/4 GPM
$111.78​/Each
Save 5%2+$106.19/Each
Save 10%4+$100.60/Each
Save 15%12+$95.01/Each
P-425
$111.78​/Each
In Stock
1/2" FNPT PVC Constant Flow Valve with EPDM Seals- 1/2 GPM
88492
1/2" FNPT PVC Constant Flow Valve with EPDM Seals- 1/2 GPM
$111.78​/Each
Save 5%2+$106.19/Each
Save 10%4+$100.60/Each
Save 15%12+$95.01/Each
P-425
$111.78​/Each
In Stock
1/2" FNPT PVC Constant Flow Valve with EPDM Seals- 3/4 GPM
88493
1/2" FNPT PVC Constant Flow Valve with EPDM Seals- 3/4 GPM
$111.78​/Each
Save 5%2+$106.19/Each
Save 10%4+$100.60/Each
Save 15%12+$95.01/Each
P-425
$111.78​/Each
In Stock
1/2" FNPT PVC Constant Flow Valve with EPDM Seals- 1 GPM
88494
1/2" FNPT PVC Constant Flow Valve with EPDM Seals- 1 GPM
$111.78​/Each
Save 5%2+$106.19/Each
Save 10%4+$100.60/Each
Save 15%12+$95.01/Each
P-425
$111.78​/Each
In Stock
1/2" FNPT PVC Constant Flow Valve with EPDM Seals- 1.5 GPM
88495
1/2" FNPT PVC Constant Flow Valve with EPDM Seals- 1.5 GPM
$111.78​/Each
Save 5%2+$106.19/Each
Save 10%4+$100.60/Each
Save 15%12+$95.01/Each
P-425
$111.78​/Each
In Stock
1/2" FNPT PVC Constant Flow Valve with EPDM Seals-  2 GPM
88496
1/2" FNPT PVC Constant Flow Valve with EPDM Seals- 2 GPM
$111.78​/Each
Save 5%2+$106.19/Each
Save 10%4+$100.60/Each
Save 15%12+$95.01/Each
P-425
$111.78​/Each
Special Order
3/4" FNPT PVC Constant Flow Valve with EPDM Seals- 3 GPM
88497
3/4" FNPT PVC Constant Flow Valve with EPDM Seals- 3 GPM
$114.65​/Each
Save 5%2+$108.91/Each
Save 10%4+$103.18/Each
Save 15%12+$97.45/Each
P-425
$114.65​/Each
Special Order
3/4" FNPT PVC Constant Flow Valve with EPDM Seals- 4 GPM
88498
3/4" FNPT PVC Constant Flow Valve with EPDM Seals- 4 GPM
$114.65​/Each
Save 5%2+$108.91/Each
Save 10%4+$103.18/Each
Save 15%12+$97.45/Each
P-425
$114.65​/Each
In Stock
3/4" FNPT PVC Constant Flow Valve with EPDM Seals- 5 GPM
88499
3/4" FNPT PVC Constant Flow Valve with EPDM Seals- 5 GPM
$114.65​/Each
Save 5%2+$108.91/Each
Save 10%4+$103.18/Each
Save 15%12+$97.45/Each
P-425
$114.65​/Each
Special Order
3/4" FNPT PVC Constant Flow Valve with EPDM Seals- 6 GPM
88694
3/4" FNPT PVC Constant Flow Valve with EPDM Seals- 6 GPM
$114.65​/Each
Save 5%2+$108.91/Each
Save 10%4+$103.18/Each
Save 15%12+$97.45/Each
P-425
$114.65​/Each
In Stock
3/4" FNPT PVC Constant Flow Valve with EPDM Seals- 7 GPM
88695
3/4" FNPT PVC Constant Flow Valve with EPDM Seals- 7 GPM
$114.65​/Each
Save 5%2+$108.91/Each
Save 10%4+$103.18/Each
Save 15%12+$97.45/Each
P-425
$114.65​/Each
In Stock
3/4" FNPT PVC Constant Flow Valve with EPDM Seals- 8 GPM
88696
3/4" FNPT PVC Constant Flow Valve with EPDM Seals- 8 GPM
$114.65​/Each
Save 5%2+$108.91/Each
Save 10%4+$103.18/Each
Save 15%12+$97.45/Each
P-425
$114.65​/Each
In Stock
1" FNPT PVC Constant Flow Valve with EPDM Seals- 5 GPM
88697
1" FNPT PVC Constant Flow Valve with EPDM Seals- 5 GPM
$127.08​/Each
Save 5%2+$120.72/Each
Save 10%4+$114.37/Each
Save 15%12+$108.01/Each
P-425
$127.08​/Each
Special Order
1" FNPT PVC Constant Flow Valve with EPDM Seals- 6 GPM
88698
1" FNPT PVC Constant Flow Valve with EPDM Seals- 6 GPM
$127.08​/Each
Save 5%2+$120.72/Each
Save 10%4+$114.37/Each
Save 15%12+$108.01/Each
P-425
$127.08​/Each
In Stock
1" FNPT PVC Constant Flow Valve with EPDM Seals- 7 GPM
88699
1" FNPT PVC Constant Flow Valve with EPDM Seals- 7 GPM
$122.29​/Each
Save 5%2+$116.17/Each
Save 10%4+$110.06/Each
Save 15%12+$103.94/Each
P-425
$122.29​/Each
Special Order
1" FNPT PVC Constant Flow Valve with EPDM Seals- 8 GPM
88700
1" FNPT PVC Constant Flow Valve with EPDM Seals- 8 GPM
$122.29​/Each
Save 5%2+$116.17/Each
Save 10%4+$110.06/Each
Save 15%12+$103.94/Each
P-425
$122.29​/Each
In Stock