 
 หัวปรับแรงดันแก๊ส First Stage Pressure Regulator FISHER รุ่น 64
| Type | Size | Outlet Pressure | Flow Capacity | 
| 64/33 | 1/2" x 1/2" FNPT | 3 to 15 psig | 2.6M BTU | 
| 64/35 | 1/2" x 1/2" FNPT | 5 to 35 psig | 3.6M BTU | 
| 64/36 | 1/2" x 1/2" FNPT | 30 to 60 psig | 3.6M BTU | 
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