Low-Temperature Extended Stem CF8M Gate Valve (10 Inch Size)

This product is a highly specialized Wedge Gate Valve designed for low-temperature or cryogenic service, indicated by the Extended Stem/Bonnet feature and the use of $\text{A}351 \text{CF}8\text{M}$ material (Cast $\text{316}\text{L}$ Stainless Steel).

The specific size mentioned is $\text{10}''$ (implied from the $\text{10}\#$ designation, although $\text{10}''$ is within the $\text{2}''\text{-}36''$ range), and the $\text{CF}8\text{M}$ material is ideal for corrosive media and low temperatures down to $\text{-196}^\circ\text{C}$ (liquid nitrogen).

📋 Key Features and Specifications

Parameter	Detail / Standard
Valve Type	Wedge Gate Valve
Specific Application	Low-Temperature / Cryogenic Service
Body Material	$\text{A}351 \text{CF}8\text{M}$ (Cast $\text{316}\text{L}$ Stainless Steel)
Design Feature	Extended Stem/Bonnet
Size	$\text{10}''$
Pressure Rating	$\text{ASME CL} 150, 300, 600, 900, 1500, 2500$
Temperature Range	Up to $\text{-196}^\circ\text{C}$ (Specific $\text{CF}8\text{M}$ suitability)
Design Standard	$\text{API} 600, \text{ASME B} 16.34$
Testing Standard	$\text{API} 598$
Connection Ends	Flange ( $\text{ASME B} 16.5/\text{B} 16.47$ ) or Butt-Weld ( $\text{ASME B} 16.25$ )

⭐ Low-Temperature and Cryogenic Design

Extended Bonnet (Cryogenic Extension):
- The valve is fitted with an extended stem/bonnet. In cryogenic service ( $\text{T} \le \text{-100}^\circ\text{C}$ ), this extension is critical for lifting the stem packing away from the cold fluid. This prevents the packing from freezing, which would make the valve inoperable, and ensures the operator’s handwheel remains at ambient temperature, preventing icing or injury.
$\text{A}351 \text{CF}8\text{M}$ Material:
- $\text{CF}8\text{M}$ is the cast equivalent of $\text{316}\text{L}$ stainless steel. Its high Nickel and Chromium content, plus Molybdenum, ensures it maintains high ductility and does not suffer from brittle fracture at extremely low temperatures (down to $\text{-196}^\circ\text{C}$ ).
Bolted/Pressure Seal Bonnet: The design allows for both Bolted Bonnet (for lower classes) and Pressure Seal Bonnet (for higher classes) to maintain seal integrity under wide thermal cycling.