BUSINESS FIELD
BUSINESS FIELD
Cryogenic control valves
The cryogenic control valve is a high-performance control valve used in LNG carriers, cryogenic tankers, and more. It boasts excellent operability in environments with super-low temperatures and excellent tightness that meets ANSI Class V.
Features
Leak-tightness
Proportional Flow Characteristics for Precision Control
Optimized design for durability
Specifications
| Pressure Drop | 1~3 Stage |
|---|---|
| Size | ¼”~20” |
| Pressure | ANSI Class #150~#2500 |
| Temperature | -196 ~ 60℃ |
| Body Type | Globe, Angle, 3-way |
| Leakage | ANSI Class V, no leak |
| Connection | RF, BW |
| Material | Stainless Steel |
Seat Leakage Class for Control valve (ANSI/FCI 70.2)
| Leakage Class | Maximum seat leakage | Testing fluid and pressure |
| Class I | Level mutually agreed upon by the user and supplier | None |
|---|---|---|
| Class II | 0.5% of valve rated capacity | Air or Water (3.5 kg/㎠) |
| Class III | 0.1% of valve rated capacity | Air or Water (3.5 kg/㎠) |
| Class IV | 0.01% of valve rated capacity/td> | Air or Water (3.5 kg/㎠) |
| Class V | 5×10-13㎥/s level | Water (maximum operating pressure) |
| Class VI | Defined in a separate table | Air or nitrogen (3.5 kg/㎠ or maximum operating pressure below this pressure) |
Flow control via plug
Linear Flow Characteristic
Applied valve
Liquid Level Control
Flow Control within a certain range
Flow is proportional to the valve plug travel
When the flow travels 50%, the flow rate is 50%.
When the flow travels 80%, the flow rate is 80%.
Valve in use
D/A Level Control Valve
Equal Percentage Characteristic
When the valve plug travel changes(%), the flow shows the same change(%) from the current flow.
When the flow travels 18%, the flow rate is 50%.
When the flow travels 50%, the flow rate is 80%.
Applied valve
Pressure Control
When the Pressure Drop is large
Valve in use
BLCV
Modified Parabolic
Between linear and equal percentage
It operates similarly with sophisticated throttling at low flows and linear at high flows.
It operates similarly with sophisticated throttling at low flows and linear at high flows.
Quick Open Characteristic
Valves that need to be opened quickly
When the flow travels 80%, the flow rate is 50%.
When the flow travels 95%, the flow rate is 80%.
Applied valve
Relief Valve
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