Globe Valve Types: Y-Type, Angle, and Standard Globe Valves — Complete Selection Guide
Quick Answer: Globe valves are designed for flow regulation and throttling, unlike gate valves which are for isolation only. The three main types are standard (Z-type), Y-type (oblique), and angle globe valves. Selection depends on pressure drop tolerance, flow characteristics, and piping configuration.
Globe Valve Type Comparison
| Type | Flow Coefficient (Cv) | Pressure Drop | Best Application |
|---|---|---|---|
| Standard (Z-Type) | Moderate | High | General throttling, clean fluids |
| Y-Type (Oblique) | High | Low | High-pressure, high-temp steam |
| Angle Globe | Moderate | Moderate | Piping direction changes, HP services |
Browse our globe valve products for flow control applications.
1. Standard Globe Valve (Z-Type)
The standard globe valve has a Z-shaped flow path that creates a 90-degree turn. This provides good throttling but at higher pressure drop. Available in bolted bonnet and pressure seal designs.
2. Y-Type Globe Valve
Y-type globe valves feature a stem at 45 degrees, reducing pressure drop by up to 50% compared to standard globe valves. Preferred for high-pressure steam systems, main steam isolation, and boiler feedwater regulation up to 565°C.
3. Angle Globe Valve
Angle globe valves combine a 90-degree turn with the globe valve mechanism, eliminating a pipe fitting. Used for boiler blowdown, heater drains, and high-pressure letdown services.
Gate Valve vs Globe Valve
Use gate valves for isolation (fully open/closed) and globe valves for throttling. Using a gate valve for throttling damages seating surfaces.
FAQ
Q: Can globe valves be used for isolation?
A: Yes, but gate or ball valves are better due to lower pressure drop when fully open.
Q: How do I select the right globe valve size?
A: Size based on required Cv, not pipe size. Oversized valves operating partially open cause erosion. Contact us for sizing help.
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Contact Vornet Valve for globe valve specifications and quotations.