Poly-Chem Valves

Polyethylene Valves for
Chemical Services

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Poly-Chem Cutout

Why use Poly-Chem® Valves?

Polyvalve Poly-Chem® valves are everything you’d expect from the company that invented polyethylene valves.

Millions of Polyvalves have been sold since 1976 and are in use throughout the world. Here’s why:

  • Rugged and reliable Polyvalve Poly-Chem® valves are the strongest part of a polyethylene piping system.
  • Drop-tight shutoff from dual elastomeric seats.
  • Fused body shell removes leak paths to the atmosphere.
  • Multiple elastomeric stem seals.
  • No metal internal parts.
  • Corrosion-free due to high-grade polymeric materials.
  • Smooth bore gives excellent flow characteristics in both full and standard port designs.
  • Suitable for buried service or above ground service
  • Wide variety of trim for your specific application.
  • Flanged end configuration available (butt fusion end configuration is standard).
All Metal System (Welded or Bolted)
  • Subject to internal and external corrosion and internal scaling.
  • Hazardous leaks at pipe connections.
  • High cost of alloy pipe, valves, and fittings.
  • Rigid metal piping systems expensive to modify.
  • Not flexible or adaptable.
Polyethylene Pipe-to-Metal Valve Systems
  • Subject to the inherent weakness of combining incompatible materials.
  • Hazardous leaks may occur where the polyethylene and metal meet.
  • High cost of alloy valves and adapters.
All-Polyethylene Systems
  • Intrinsically safe.
  • Pipe is fused to the valves so there are no leak points.
  • No chance of internal or external corrosion.
  • Lightweight and flexible.
  • Can rest on ground.

Poly-Chem® Valve Availability

Body Resin
Resin
Supplier
Material
Description
Color ASTM Material Designation Material Density
Dow DGDA 2490 Black PE 4710/3408 High
Poly-Chem with Flanges Available with flanged ends. Contact the factory for dimensions and pricing.
Maximum Allowable Service Pressures
Poly-Chem® Valves for Chemical Services PE 4710/3408 Material
 
Temperature SDR
9
SDR
11
SDR
13.5
SDR
17
psig psig psig psig
bar bar bar bar
Acids, bases, dry gas gathering, drain water, and salt water
74°F 200 160 128 100
23°C 13.8 11 8.8 6.9
140°F 100 80 64 50
60°C 6.9 5.5 4.4 3.4
Gaseous Hydrocarbons
74°F 128 102 82 64
23°C 8.8 7.1 5.3 4.4
140°F 64 51 41 32
60°C 4.4 3.5 2.8 2.2
Liquid Hydrocarbons
74°F 100 80 64 50
23°C 6.9 5.5 4.4 3.4
140°F 50 40 32 25

Dimension Data

Poly-Chem Dimensions
ANSI Valve Dimensions
 
Size Port A B C D E Weight
(lbs.)
1/2 full 10.0 3.4 4.8 2.8 0.50 1.2
3/4 full 10.0 3.4 4.8 2.8 0.75 1.2
1 standard 10.0 3.4 4.8 2.8 0.90 1.2
1-1/4 full 13.0 4.5 6.5 3.7 1.30 3.1
standard 10.0 3.4 4.8 2.8 .90 1.2
1-1/2 full 13.0 4.5 6.5 3.7 1.30 3.1
2 full 14.7 6.4 9.1 4.2 1.82 3.8
standard 13.0 4.5 6.5 3.7 1.30 3.1
3 full 15.0 8.0 11.4 3.5 2.50 8.9
standard 12.8 6.4 9.1 3.6 1.95 4.5
4 full 20.0 10.4 15.0 3.1 3.62 19.5
standard 15.0 8.0 11.4 3.8 2.50 8.9
6 full 21.0 12.6 18.6 3.9 5.20 38.0
standard 20.0 10.4 15.0 5.3 3.62 23.0
8 full 69.8 12.5 19.9 24.0 6.60 98.0
standard 20.0 12.6 18.6 4.5 4.78 42.5
Gear Operated
8 full 69.8 14.8 22.2 24.0 6.6 134
10 full 55.25 17.5 27.7 15.75 10.0 251
12 full 83.8 17.5 27.7 30.0 10.0 305
14 full 88.3 20.2 32.6 28.0 11.5 365.0
standard 55.25 17.5 27.7 15.75 10.0 261
16 full 88.3 20.2 32.6 28.0 11.5 365
standard 55.25 17.5 27.7 15.75 10.0 275
Metric Valve Dimensions
 
Size Port A B C D E Weight
(kg)
16-20 full 254 86 122 71 12.7 0.5
25 full 254 86 122 71 19.1 0.5
32 standard 254 86 122 71 22.9 0.5
40 full 330 115 165 94 33.0 1.4
standard 254 86 122 71 22.9 0.5
50 full 330 115 165 94 33.0 1.4
55-63 full 373 164 231 106 46.2 1.7
50-63 standard 330 115 165 94 33.0 1.4
90 full 381 203 290 89 63.5 4.0
standard 325 164 231 91 48.0 2.0
100-110-125 full 508 264 381 77 91.9 8.8
standard 381 203 290 95 63.5 4.0
150-160
& 180
full 533 320 472 99 132.1 17.2
160 standard 508 263 381 133 91.9 10.4
200-225 full 737 318 504 610 168 44.5
standard 508 320 472 102 121.4 19.3
Gear Operated
225 full 1773 376 564 610 169 60
250-280 full 1403 445 704 400 254 113
315 full 2129 443 704 762 251.7 138
355 full 2243 513 828 711 292 165
standard 1403 445 704 400 254 118
400 full 2243 513 828 711 292 165.6
standard 1403 445 704 400 254 124.7
Materials of Construction and Trim Selection
  • Poly-Chem® Valves are not suitable for use on aromatic hydrocarbons, ketones, ethers, gasoline.
  • Poly-Chem® Valves are not intended for fuel gas services.
  • Please refer to the PE pipe manufacturers recommendations for additional service compatibility information or send full service details to Polyvalve Valves for our advice.
  • For applications not listed, please contact Polyvalve for valve recommendations.
  • For 1/2" through 2" standard port, consult Polyvalve.
For inorganic acids such as hydrochloric, nitric, sulphuric, phosphoric, hydrofluoric and boric please contact Polyvalve for valve recommendations.
Item Cat A Trim Cat B Trim Cat C Trim Cat D Trim
Body HDPE HDPE HDPE Special Applications
Ball Polypropylene Polypropylene Polypropylene
Seat Retainers Polypropylene Polypropylene Polypropylene
Seats EPDM EPDM Viton A
Stem Modified Polyphenylene Oxide Poly-etherimide Poly-etherimide
Stem Seals EPDM EPDM Viton A
Groundwater Seal Neoprene Neoprene Neoprene
Wrench Adapter Polypropylene Polypropylene Polypropylene
Primary Applications
2" full port through 12" full port
Strong bases: Hydroxides, caustics
Organic acids: Acetic
Ammonia and ammonium salt solutions
Nonpotable water
Air and inert gases
Alcohols and glycols Metal salt solutions: Bicarbonates, bromides, carbonates, chlorides, cyanides, ferri-cyanides, fluorides, hypochlorites, nitrates, oxides, phosphates, sulphates, or sulphides, of Aluminum, Barium, Calcium, Copper, Iron, Magnesium, Mercury, Nickel, Potassium, Silver, Sodium, Tin, or Zinc.

Other: Crude oil, produced water, carbon dioxide, hydrogen sulphide, landfill methane and leachate, hydrogen peroxide.

Ball Valves for Chemical Services
Note: Cv in US gal/min @ 1 psi ΔP. Kv in litres/min @ 1 bar ΔP
Size Body Pieces Port End Config. Cv Kv Equiv. Length of Pipe (ft.) Available SDRs
In. metric
2 55-63 3 full BF 175 2528 3.8 9.3, 11
3 90 3 full BF 390 5624 5.3 9.3, 11, 13.5
3 standard BF 240 3461 14.1 9.3, 11, 13.5
4 100-110 3 full BF 700 10094 5.8 9.3, 11, 13.5
3 standard BF 400 5768 17.8 9.3, 11, 13.5
6 150-160- 180 3 full BF 1800 25957 6.1 9.3, 11, 13.5
3 standard BF 900 12978 24.3 9.3, 11, 13.5
8 225 2 full BF 3650 52633 5.5 11, 13.5
12 315 3 full BF 7000 73542 10.6 11, 13.5