Armstrong International Direct Acting Pressure Reducing Valve
The GD-30 (bronze), GD-30S (stainless steel), and GD-45 (cast iron) is a compact pressure regulators for steam, air, and non-corrosive gases, handling inlet pressures up to 300psig.

Overview
Features
- Inlet pressure range: 15-300psig
- Reduced pressure range: 3-140psig
- Maximum temperature:
- GD-30: 410°F
- GD-30S: 430°F
- GD-45: 450°F
- Body material options:
- GD-30: Cast bronze
- GD-30S: Stainless steel
- GD-45: Cast Iron
- Applications: Steam, air, and non-corrosive gases
- Shutoff classification: ANSI Class IV for tight shutoff
- Turndown ratio: 10:1 for precise flow control
- Connection sizes: 1/2in to 2in
- Cv values: 1.3 to 8.5 for flow capacity
Description
The Armstrong International Direct Acting Pressure Reducing Valve is a compact, high-performance solution for controlling steam, air, and non-corrosive gas pressures. Designed for applications with low to moderate flow, these valves provide reliable pressure reduction with an accuracy of ±10%. The GD-30/30S/45 feature a turndown ratio of 10:1, ensuring efficient operation, and offer tight shutoff in dead-end service on steam systems. The GD-30 is constructed from cast bronze, while the GD-30S is made from stainless steel, and the GD-45 is made from cast iron, allowing for greater resistance to corrosion and higher pressure ratings.
These direct-acting valves accommodate inlet pressures from 15 to 300psig and reduce pressure within a range of 3 to 140psig. The GD-30 is rated for a maximum temperature of 410°F, while the GD-30S can handle temperatures up to 430°F, and the GD-45 rated for a maximum temperature of 450°F. Available in sizes from 1/2in to 2in, these valves support a range of flow capacities with Cv values between 1.3 and 8.5. The internal components, including stainless steel bellows and valve seats, enhance durability and long-term performance.
Armstrong International Direct Acting Pressure Reducing Valve Applications:
- Laundry and dry-cleaning equipment
- Hospital equipment
- Humidifiers
- Tire molds
- Small industrial heaters
- Food processing and packaging equipment
Documents
Spec Sheets
- Armstrong International Direct Acting Pressure Reducing Valve GD-30/30S Datasheet (228 KB)
- Armstrong International Direct Acting Pressure Reducing Valve GD-45 Datasheet (391 KB)
Manuals
- Armstrong International Direct Acting Pressure Reducing Valve GD-30/30S Manual (216 KB)
- Armstrong International Pressure Reducing Valve GD-30/30S Installation/Maintenance Instructions
- Armstrong International Pressure Reducing Valve GD-45 Installation/Maintenance Instructions (322 KB)
Links
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