Double Ball Isolation Valve | 8070T Series | FNPT Connections
Red-White Valve’s 8070T Isolation Drain Valve combines dual-valve safety with rugged, high-pressure performance for industrial hydronic, oil, gas, and steam systems.
Engineered for extreme reliability, it features 600 PSI WOG pressure tolerance and FNPT threaded connections for secure, vibration-resistant installation.
The double-ball design isolates system sections during maintenance—eliminating the need for full shutdowns—and its DZR lead-free brass body provides outstanding corrosion protection even in harsh chemical or high-temperature applications.
Key Features & Benefits
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Dual-Ball Safety Lock — Isolates mid-line drain ports for safe service without depressurizing the entire system.
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High-Pressure Durability — 600 PSI WOG rated for oil, gas, and steam environments—ideal for refineries and power plants.
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Threaded FNPT Ends — Female NPT connections ensure permanent, vibration-proof seals compliant with ASME B1.20.1.
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Full-Port Chrome Balls — Unrestricted flow with corrosion-resistant plating for smooth operation and long service life.
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PTFE Seats + EPDM Gasket — Designed for zero leakage and 15,000+ cycles even under abrasive or high-temperature conditions.
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Temperature Range — Operates from -40°F to 260°F (-40°C to 127°C) using antifreeze or anti-boil additives as needed.
Technical Specifications
| Parameter |
Details |
| Pressure Rating |
600 PSI WOG |
| Temperature Range |
-40°F to 260°F (-40°C to 127°C) |
| Connections |
FNPT × Male Hose (¾″ NH) |
| Body Material |
DZR Lead-Free Brass (ASTM B927 C27453) |
| Ball Material |
LF Brass / Chrome Plated (ASTM B927 C27450) |
| Seat Material |
Virgin PTFE |
| O-Ring / Gasket |
EPDM Peroxide (NSF Approved) |
| Certifications |
NSF/ANSI 61 (potable water) | AB1953 Lead-Free |
Dimensions / Weight
| Size |
A Thread |
B [in] |
C [in] |
D [in] |
I [in] |
F Thread |
H [in] |
L [in] |
M [in] |
N [in] |
P [in] |
Wt. [lb] |
| ½″ |
½–14 NPT |
0.61 |
1.85 |
0.50 |
2.54 |
¾–11.5 NH |
2.07 |
3.60 |
4.02 |
9.06 |
0.50 |
1.28 |
| ¾″ |
¾–14 NPT |
0.63 |
2.01 |
0.50 |
2.54 |
¾–11.5 NH |
2.20 |
3.60 |
4.41 |
9.21 |
0.73 |
1.58 |
| 1″ |
1–11.5 NPT |
0.75 |
2.13 |
0.50 |
2.54 |
¾–11.5 NH |
2.57 |
4.98 |
5.09 |
12.10 |
0.98 |
2.46 |
| 1¼″ |
1¼–11.5 NPT |
0.77 |
2.72 |
0.73 |
3.02 |
¾–11.5 NH |
2.74 |
4.98 |
6.02 |
12.70 |
1.23 |
3.10 |
Material Construction
| # |
Part |
Material |
Specification |
| 1 |
Body |
DZR Lead-Free Brass |
ASTM B927 C27453 |
| 2 |
Fixed End |
DZR Lead-Free Brass |
ASTM B927 C27453 |
| 3 |
Ball |
LF Brass / Chrome Plated |
ASTM B927 C27450 |
| 4 |
Seat |
PTFE |
– |
| 5 |
Stem |
DZR Lead-Free Brass |
ASTM B927 C27453 |
| 6 |
Packing Ring |
PTFE |
– |
| 7 |
Packing Nut |
Brass |
ASTM B124 C37700 |
| 8–10 |
Hardware |
Steel / Zn Plated |
ASTM A36 |
| 11 |
Handle |
Aluminum |
ASTM B85 |
| 12–18 |
Secondary Ball & Drain Components |
DZR Brass / PTFE / EPDM Perox |
NSF Approved |
Warning (California Prop 65): This product can expose you to chemicals including lead, known to the State of California to cause cancer and reproductive harm.
For more information, visit www.P65Warnings.ca.gov.
