Fushiman Co.
Fushiman MB14 type check valve
Manufacturer: Fushiman Co.,LTD.
Model: MB14
| Model | Nominal diameter | Fluid | Maximum Operating Pressure | Maximum Operating Temperature | Body Material | Connection |
|---|---|---|---|---|---|---|
| MB14 | 15–50 | Steam Gas Liquid | 1.3 MPa | 250°C | Brass | Screw in |
Compact and lightweight — installation orientation is optional.
Features
- Installation direction is optional
It can be mounted vertically, horizontally, or on sloped piping, making it highly convenient. - Quick-closing valve
The valve closes quickly before backflow occurs, thanks to a structure that applies closing force with a spring. - Opens at low differential pressure
Opens at a low differential pressure of 1.5–2.0 kPa. - Lightweight and compact
- Minimal seat leakage
Leakage is extremely minimal.
Specifications
| Type | Threaded Type Spring-Loaded Lift Check Valve | |||
| Model | MB14 | |||
| Type of Disc Contact Surface | Metal Seat | |||
| Applicable Fluid | Applicable Fluids: Steam, air, gas, mineral oil, etc. (¹) | |||
| Maximum Operating Pressure (MPa) | 1.6 | 1.4 | 1.3 | |
| Maximum Operating Temperature (°C) | 120 | 200 | 250 | |
| Material | Disc | Stainless Steel | ||
| Valve Body & Seat (Integral) | Brass | |||
| Spring | Stainless Steel | |||
| Spring Retainer | Stainless Steel | |||
| Opening Pressure | 1.5~2.0kPa | |||
Note (¹): Not suitable for use with water as the fluid.
Structure and Dimensions
| Pipe Connection | JIS Parallel Pipe Thread (Rp) | ||||||
| Nominal Diameter | 15 | 20 | 25 | 32 | 40 | 50 | |
| Dimensions | d | ½ | ¾ | 1 | 1¼ | 1½ | 2 |
| L | 49 | 49 | 61 | 61 | 72 | 72 | |
| D | 39 | 39 | 60.5 | 60.5 | 80 | 80 | |
| AF | 30 | 30 | 46 | 46 | 65 | 65 | |
| Cv Value | 4.8 | 4.8 | 13 | 13 | 36 | 36 | |
| Weight | 0.23 | 0.18 | 0.65 | 0.49 | 1.24 | 0.94 | |
Operation
When fluid flows, the pressure pushes the valve open.
When the fluid flow stops, the spring’s closing force activates, and the valve closes before backflow can occur.
Pressure Loss
- The graph lines represent fluid with a specific gravity of 1 at 20°C.
- To calculate the pressure loss for other fluids, use the following formula to determine the equivalent water flow rate, then refer to the graph:
Vw = V × ρ / 1000
Vw: Equivalent water flow rate (ℓ/s or m³/h)
ρ: Fluid density (operating) (kg/m³)
V: Actual flow rate (operating) (ℓ/s or m³/h) - The graph is based on horizontal piping.
- In vertical piping, there may be slight differences before the valve is fully open. Once fully open (normal flow condition), the behavior is the same as in horizontal piping.
Note (²):
When pressure loss ΔP is 5 kPa or lower, chattering may occur, so please do not use under such conditions.
