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Miyawaki Ball Float Steam Trap GWH70 – Reliable Condensate Discharge for Precision Steam Systems
- Luis Alberto Fing
- Oct 29
- 3 min read
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Introduction
In Miyawaki, the Ball Float Steam Trap GWH70 belongs to the renowned Series G, a product line recognized for its precision, reliability, and efficiency in condensate discharge. In high-performance steam systems, efficient condensate removal is vital to maintain heat transfer efficiency, prevent water hammer, and extend equipment life. The Miyawaki Ball Float Steam Trap GWH70 delivers precision-engineered performance and durability—representing the excellence of Japanese steam control technology. Designed for continuous condensate discharge, this model ensures stable operation under varying pressure and load conditions, making it a preferred solution for modern industrial steam networks.
General Operating Data
Model | Max. Operating Pressure | Max. Operating Temperature | Max. Discharge Capacity |
GWH70 | 6.5 MPa | 425°C | 6.3 t/h |
Key Features of the Miyawaki Ball Float Steam Trap GWH70
The Ball Float Steam Trap GWH70 embodies Miyawaki’s commitment to advanced engineering and reliability. It is designed to automatically discharge condensate without steam loss, providing consistent efficiency for high-demand steam processes.
Suitable for Medium Capacity Steam Processes
Capable of continuously adjusting the valve opening according to incoming condensate flow, the GWH70 maintains maximum heat exchange efficiency even under fluctuating steam loads.
High Discharge Capacity
A double-port balanced valve enables larger condensate discharge with a compact body design—ideal for systems requiring rapid condensate handling.
Easy Maintenance
The internal screen can be removed quickly and easily without detaching the trap from the pipeline, minimizing maintenance time and system downtime.
Countermeasure Against Erosion
Equipped with stainless steel components at the outlet, this model ensures resistance against erosion caused by high-velocity condensate flow, extending operational life.
Condensate Recovery Support
With excellent back pressure tolerance, the GWH70 effectively supports condensate recovery systems, contributing to improved energy efficiency and sustainability.
Quick Startup
An internal thermostatic air vent automatically discharges air, gases, and cold condensate during system startup, allowing immediate stable operation.
Dimensional Specifications and Installation Options
The Miyawaki Ball Float Steam Trap GWH70 is available in multiple connection types to suit diverse industrial piping systems, including Socket Weld, Butt Weld, and Flanged models. All variants are manufactured in compliance with international standards for strength, safety, and reliability.
Dimensional Specifications Table
Connection Type | Standards | Sizes | Dimensions (mm) | Maintenance Space (mm) | Weight (kg / lb) | Notes |
Socket Weld | ASME B16.34 Class 900, JIS Sch 160 | 1½" / 2" | L 480 × H1 140 × H2 190 × W 290 | 110 | 62 / 137 | Standard configuration |
Butt Weld | ASME B16.25 Sch160, JIS Sch 160 | 1½" / 2" | L 480 × H1 140 × H2 190 × W 290 | 110 | 62 / 137 | Similar design as Socket Weld |
Flanged | ASME/JPI Class 600, Class 900, JIS 40K, 63K; PN40, PN63 | 1½" / 2" | L 630 × H1 140 × H2 190 × W 290 | 110 | 72–85 / 159–187 | Custom dimensions available upon request |
Each model is engineered for robust integration into steam networks, with precise tolerances ensuring leak-free operation and simplified maintenance.
Operating Specifications Table
Model | Connection Type | Size | Max. Operating Pressure (PMO) | Max. Operating Differential Pressure (PMX) | Max. Operating Temperature (TMO) | Body Material |
GWH70-W | Socket Weld* | 1½" / 2" | 6.5 MPa (943 psig) at 425°C (797°F) | 6.5 MPa (943 psig) | 425°C (797°F) at 6.5 MPa (943 psig) | Cast Steel A216 WCB |
GWH70-BW | Butt Weld* | 1½" / 2" | 6.5 MPa (943 psig) at 425°C (797°F) | 6.5 MPa (943 psig) | 425°C (797°F) at 6.5 MPa (943 psig) | Cast Steel A216 WCB |
GWH70-F | Flanged* | 1½" / 2" | 6.5 MPa (943 psig) at 425°C (797°F) | 6.5 MPa (943 psig) | 425°C (797°F) at 6.5 MPa (943 psig) | Cast Steel A216 WCB |
Available Standards:
Socket Weld: ASME B16.34 Class 900, JIS Sch 160
Butt Weld: ASME B16.25 Sch160, JIS Sch 160
Flanged: ASME/JPI Class 600, Class 900, JIS 40K, 63K, PN40, PN63
Maximum allowable pressure (PMA): 6.5 MPa (psig)Maximum allowable temperature (TMA): 425°C (797°F) at 6.5 MPa (751 psi).
Engineering Excellence from Miyawaki
For over 80 years, Miyawaki has been a pioneer in the field of steam traps and condensate management. The GWH70 represents their advanced mechanical design heritage—combining precise float mechanisms with proven reliability to ensure optimal condensate control even under fluctuating steam loads.
Why Choose the Miyawaki Ball Float Steam Trap GWH70
Reliable condensate removal at all loads
Low maintenance operation
High resistance to erosion and corrosion
Efficient condensate recovery support
Compact, robust Japanese design for industrial applications
Available in multiple connection standards (Socket, Butt, Flanged)
The Miyawaki Ball Float Steam Trap GWH70 is an investment in operational stability, energy efficiency, and long-term system performance. eiyo Electric Product Selectoreiyo Electric Product Selector
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