1. Flange standard: HG/T 20592, HG/T 20615, or specified by the user

2. Installation center distance: L=500,800,1100,1400,1700 (or user specified)

3. Nominal pressure: PN≤42MPa

4. Design temperature: -196℃≤t≤450℃

5. Observation range: center distance L-140 (there is a blind area of 70mm at both ends of the standard liquid level gauge)

6. Maximum allowable error: ±10mm

7. The observation length of the liquid level gauge without blind area = the length of the center distance L, and the range of the blind area between every two adjacent windows: 45mm

8. Steam tracing pressure: ≤1.6MPa

9. Heat tracing interface size: Standard configuration: G1/2”(M) (or specified by the user)

10. Blowdown valve outlet connection size: ball valve: G3/4” (M) + pipe cap; gate valve: NPTl/2 (F); or specified by the user

11. Valve self-locking pressure: P≥0.3MPa

12. Anti-frost medium temperature: -20～0℃, -40～-20℃, -70～-40℃, -196～-70℃

Main body material: 20#, 16Mn, 09Mn2V, 304 /316

Anti-frost fin height: 50, 100, 150, 200