Overview: The GD-30/30S is a compact, high-performance direct-acting valve designed for steam, air, and non-corrosive gases. It is economical and suitable for low to moderate flow applications with an accuracy of +/-10%. Common applications include laundry and dry cleaning equipment, hospital equipment, tire molds, humidifiers, small heaters, and food processing.

Specifications:

• GD-30: Made of cast bronze (ASTM B584) with phosphor bronze bellows (ASTM B103). Suitable for steam, air, and non-corrosive gases with a maximum temperature of 410°F (210°C) and inlet pressure of 15-250 psig (1-17 bar).
• GD-30S: Constructed from stainless steel (AISI 316) with stainless steel bellows (AISI 316L). Designed for steam applications with a maximum temperature of 430°F (220°C) and inlet pressure of 15-300 psig (1-20 bar).

Dimensions and Weights: The valve is available in various connection sizes (1/2", 3/4", 1", 1-1/2", 2") with corresponding dimensions and weights. For example, the 1/2" size has a length of 3-1/8" (80 mm) and a weight of 4-1/4 lb (1.9 kg).

Performance: The GD-30/30S provides tight shutoff for dead-end service on steam. The Cv values range from 1.3 to 8.5 depending on the connection size. The valve's capacities cannot be determined with a formula and require consulting capacity tables.

Pressure and Temperature Controls: The document includes detailed tables for steam capacities in lb/hr and kg/hr, with conversion factors for air capacities. The maximum pressure reduction ratio is 10:1.

Additional Notes: Certified drawings are available for detailed specifications: GD-30 (bronze only) CDY #1038 and GD-30S (stainless steel) CDY #1089. Design and materials are subject to change without notice.