Danfoss CP458-2 User guide
Pilot Operated Check Valves Technical Information
Reverse Pilot to Open CP458-2
OPERATION |
This valve is a pilot-to-open check valve. |
SPECIFICATIONS |
Theoretical performance |
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psi |
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bar |
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154 SUS (33 cSt) hyd. oil @ 100° F (38° C) |
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203 |
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14 |
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174 |
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12 |
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145 |
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10 |
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116 drop |
8 |
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<![if ! IE]> <![endif]>Pressure |
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2 |
1 |
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87 |
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6 |
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free flow |
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58 |
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4 |
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1 |
2 |
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29 |
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2 |
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pilot open |
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0 |
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L/min |
8 |
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16 |
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24 |
32 |
40 |
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Flow |
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US gal/min |
2.1 |
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4.2 |
6.3 |
8.5 |
10.6 |
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Schematic
Specifications
Rated pressure |
210 bar [3000 psi] |
Rated flow at 7 bar |
20 l/min |
[100 psi] |
[5 US gal/min] |
Leakage |
6 drops/min @ |
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Rated pressure |
Weight |
0.07 kg [0.15 lb] |
Pilot ratio |
2.8:1 |
Cavity |
SDC08-3 |
Note: A piston seal requires a 4.5 bar [65 psi] or greater return spring.
DIMENSIONS mm [in]
ORDERING INFORMATION
Cross-sectional view
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3/4-16 UNF-2A |
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h 0.875 in |
1 |
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t 27-34 N.m |
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[20-25 lbf.ft] |
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2 |
3 |
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40.6 |
6.4 |
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[1.60] |
[0.25] |
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CP458 - 2 - B - 6S - 065 - 0 |
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Seals |
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Seal kit |
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B |
= Buna-N |
120250 |
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V |
= Viton |
120253 |
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Housing and ports |
Housing P/N |
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0 |
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= |
No Housing |
No Housing |
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SE2B |
= |
Al, 1/4 BSP |
SDC08-3-SE-2B |
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SE3B |
= |
Al, 3/8 BSP |
SDC08-3-SE-3B |
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4S |
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Al, #4 SAE |
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CP08-3-4S |
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6S |
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= |
Al, #6 SAE |
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CP08-3-6S |
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Other housings available
Piston seals
0 = No seals
S = Seals included
Crack |
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Pressure |
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bar |
[psi] |
065 = 4.48 |
[65] |
BC332375625108en-000101 • February 2020 |
PO - 10 |
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