Hy-Lok SVH2MF-8N-S316 High-Pressure Needle Valve
Engineered for precision and durability, the Hy-Lok SVH2MF-8N-S316 needle valve is designed to provide safe and reliable shutoff in high-pressure systems up to 6,000 psig. Constructed from corrosion-resistant 316 stainless steel, this valve features a straight pattern body with 1/2" male NPT × 1/2" female NPT end connections, making it ideal for instrumentation, chemical processing, and fluid handling applications. With PTFE or optional Grafoil packing, it supports a wide operating temperature range and ensures leak-tight performance in demanding environments. The compact design and finely threaded stem allow for accurate flow control and easy integration into systems where precision and safety are critical.
| Description |
Grade / ASTM Specification |
| Valve Body Materials |
| 316SS |
Carbon Steel |
Alloy 400 |
| 1 |
Handle |
Stainless Steel |
Aluminum |
Stainless Steel |
| 2 |
Set Screw |
Stainless Steel |
| 3 |
Lock Nut |
316SS/A479 |
| 4 |
Packing Bolt |
316SS/A479 |
| 5 |
Packing Gland * |
316SS/A479 |
| 6 |
Packing Washer * |
Reinforced PTFE |
| 7 |
Packing * |
PTFE, Grafoil |
| 8 |
Bonnet * |
316SS/A479 |
C, Steel/A105 |
Alloy 400/B164 |
| 9 |
Stem * |
316SS/A479 |
| 10 |
Vee Tip * |
630SS/A564 |
Alloy 500/B865 |
| Ball Tip * |
| 11 |
Stop Pin |
Stainless Steel |
| 12 |
Body |
316SS/A479 |
C, Steel/A105 |
Alloy 400/B164 |
"*"marked are wetted parts.
| Series |
Packing Material |
Body Material |
Temperature Range |
Pressure Rating at 100°F |
Pressure Rating at Maximum Temperature |
| SVH1 |
PTFE |
Stainless Steel |
-65°F ~ 450°F (-54°C ~ 232°C) |
10000 psig |
4000 psig at 500°F (276 bar at 260°C) |
| Carbon Steel |
| SVH2 |
PTFE |
Stainless Steel |
-65°F ~ 450°F (-54°C ~ 232°C) |
6000 psig |
4130 psig at 450°F (285 bar at 232°C) |
| Carbon Steel |
-20°F ~ 350°F (-29°C ~ 176°C) |
6000 psig |
5230 psig at 350°F (360 bar at 176°C) |
| Alloy 400 |
-65°F ~ 450°F (-54°C ~ 232°C) |
5000 psig |
3970 psig at 450°F (274 bar at 232°C) |
| Grafoil |
Stainless Steel |
-65°F ~ 1200°F (-54°C ~ 648°C) |
6000 psig |
1715 psig at 1200°F (118 bar at 648°C) |
| Carbon Steel |
-20°F ~ 350°F (-29°C ~ 176°C) |
6000 psig |
5230 psig at 350°F (360 bar at 176°C) |
| Alloy 400 |
-65°F ~ 500°F (-54°C ~ 260°C) |
5000 psig |
3960 psig at 500°F (273 bar at 260°C) * |
* Not applicable over 500°F (260°C)
