SUNFUN Group specializes in intelligent and sustainable industrial development. Driving quality advancement in manufacturing across China and the globe through technological innovation, we are committed to creating green value for a better human life.
We have deep expertise in smart energy and smart manufacturing, consistently achieving breakthroughs in precision production. Our capabilities range from 0.001-mm precision machining to the manufacture of components weighing from 0.1 grams to 150 tons. We maintain energy consumption within 0.1% and implement fully intelligent process management—all supported by four decades of specialized experience!
Innovation is the foundation of the growth of our group. We have built an open and collaborative innovation ecosystem, partnering with governments, enterprises, universities, and institutions to enable cooperative innovation and shared value, injecting sustained momentum into the industry.<br/>
As an accredited technology enterprise with its own institute and talent academy, SUNFUN has completed more than ten national-level R&D tasks and undertaken major projects commissioned by agencies such as the NDRC, MOST, and MIIT.
Performance Parameters
● Operating Temperature Range:
High temperature resistance: 400°C (Open), 300°C (Closed)
● Low temperature: -200°C
● Pressure Range: 1×10⁻¹⁰ mbar~1000 mbar
● All stainless steel structure
● Bellows stem seal
● Leak Rate: 5×10⁻¹⁰ mbar·L/sec
● Closing Torque:
CR35: Initial 300kg-cm, Max 600kg-cm
CR63: Initial 300kg-cm, Max 900kg-cm
● Installation Direction: Any position
|
Model |
A |
B |
C |
D |
O.D. |
Part No. |
|
STVBAK-CR35 |
152.4 |
86 |
125 |
184 |
38.1 / 25.4 |
307513030011 |
|
STVBAK-CR63 |
228.6 |
113.6 |
165 |
247 |
60.5 / 34 |
307515030011 |












