Page 1: Table Of Contents
Model 380 Control Valve (8 Inch Only) Operation, Parts, and Instruction Manual Figure 1 Model 380 Control Valve with DFC Actuator TABLE OF CONTENTS Introduction Assembly General Plug Seal Assembly Scope Trim Parts Assembly Speciﬁ cations Bonnet Assembly Unpacking Packing Assembly...
Page 2: Introduction
These valves are used in all kinds of demanding applications, including oil and gas production and chemical process. Both Models 380 and 381 are cage guided control valves with balanced plugs. Model 380 control valves are capable of Class V shutoff at process temperatures below 450°F (232°C).
Page 3: Specifications
Characteristics Refer to Table 1 of the Sales Bulletin. Equal Percentage (Standard) • Modiﬁ ed Equal Percentage • Consult your Dyna-Flo sales ofﬁ ce for other available Linear conﬁ gurations. • Contact factory for Low-Noise and Anti-Cavitation options. • Sizes and End Connection Styles...
Page 4: Unpacking
Model 380 Control Valve (8 Inch Only) Operation, Parts, and Instruction Manual UNPACKING VALVE FROM SHIPPING CONTAINER Check the packing list, verify that the list includes all the materials in the shipping container before unpacking. Valve information can be found on the nameplate (Key 33). Refer to Figure 3 and xx for possible nameplate locations.
Page 5: Periodic Inspection
Model 380 Control Valve (8 Inch Only) Operation, Parts, and Instruction Manual PERIODIC INSPECTION MAINTENANCE CAUTION: Use safe work practices and lock out procedures Only “Certiﬁ ed Technicians” should be disassembling and when isolating valves and actuators! Always be aware of inspecting these valves and actuators.
Page 6: Actuator Mounting Nuts And Bolts - Figure
Model 380 Control Valve (8 Inch Only) Operation, Parts, and Instruction Manual MAINTENANCE Remove the actuator mounting nuts (Key 32) and lift (Continued) actuator off of valve, store in a safe place. Removing Actuator from Valve (Continued) Remove the stem connector (Refer to the Actuator...
Page 7: Valve Disassembly
NOTE: For instructions on Anti-Cavitation and Low-Noise trim from the upstream and downstream sides of the valve. Check contact the Dyna-Flo Sales Ofﬁ ce. that bypass valves are used or the process has been completely shut down.
Page 8: Packing Parts Removal
Serial Numbers AFTER P191270-01. crushed. Spiral wound gaskets cannot be reused. For more information contact Dyna-Flo Control Valve Services. Inspect all gasket surfaces for damage. Inspect the internal body surfaces for any signs of corrosion, erosion or irregular wear.
Page 9: Trim Parts Assembly
Model 380 Control Valve (8 Inch Only) Operation, Parts, and Instruction Manual ASSEMBLY (Continued) Plug Seal Assembly For one-piece seal ring: Refer to assembly diagram (Figure 9). Lubricate plug seal diameter and install seal ring (Key 29) with cup facing the correct direction as shown in Figure 9.
Page 10: Bonnet Assembly
Model 380 Control Valve (8 Inch Only) Operation, Parts, and Instruction Manual Ensure all parts have been cleaned and inspected prior to replacing packing. (See Disassembly section for inspection ASSEMBLY (Continued) procedures). Trim Parts Assembly For single style (spring-loaded) packing:...
Page 11: Model 381 Cage / Piston Ring Detail - Figure
Model 380 Control Valve (8 Inch Only) Operation, Parts, and Instruction Manual Table 1 Bolting Material and Designations Material Temperature Limitations B7 (Standard) F to 900 F (-46 C to 482 B7M (NACE 150-300 ASME Class) F to 900 F (-46...
Page 12 Model 380 Control Valve (8 Inch Only) Operation, Parts, and Instruction Manual DOUBLE STYLE GRAPHITE PACKING PTFE PACKING SINGLE STYLE PTFE PACKING 1” (25.4 mm) Stem 1” (25.4 mm) Stem 1” (25.4 mm) Stem 1-1/4” (31.8 mm) Stem 1-1/4” (31.8 mm) Stem 1-1/4”...
Page 13 Model 380 Control Valve (8 Inch Only) Operation, Parts, and Instruction Manual DETAIL A FLOW DOWN DETAIL A FLOW UP Figure 9 Model 380 Control Valve Cross Section P-388M0319A Dyna-Flo Control Valve Services Ltd. Phone: 780 4000 Toll Free: 1 2356...
Page 14 Model 380 Control Valve (8 Inch Only) Operation, Parts, and Instruction Manual Figure 10 Detail B - O-Ring and Gasket Seat Ring Seal Figure 11 Model 381 Cage / Piston Ring Detail P-388M0319A Dyna-Flo Control Valve Services Ltd. Phone: 780...
Page 15: Parts List
Model 380 Control Valve (8 Inch Only) Operation, Parts, and Instruction Manual Parts Description Part Number Body Description Part Number if you need a body as a replacement part, order by Bonnet valve size and stem diameter, serial number and desired if you need a bonnet as a replacement part, order by material.
Page 16 Model 380 Control Valve (8 Inch Only) Operation, Parts, and Instruction Manual Table 6 Packing Box Parts (Keys 2, 3, 4, 5, 6 & 7) Stem Diameter inch (mm) Description 1 (25.4) 1-1/4 (31.8) Packing Set (PTFE) QTY: 1 for Single, 2 for Double...
Page 17 Model 380 Control Valve (8 Inch Only) Operation, Parts, and Instruction Manual Table 7 Key 16, Valve Plug for Spring-Loaded Seal Ring Valve Size Stem Diameter S31600(S31603) / Alloy 6 S42000 Inch Inch (mm) Hard Faced Seat & Guide 1 (25.4) 380P8021X5D 1-1/4 (31.8)
Page 18 Our Commitment to Quality Dyna-Flo is committed to continuous improvement. While all efforts have been made to ensure the accuracy of the content in this document, modiﬁ cations or improvements to the information, speciﬁ cations, and designs may occur at any time without notice.
Page 19 Model 380 Control Valve (8 Inch Only) Operation, Parts, and Instruction Manual This page left blank intentionally. P-388M0319A Dyna-Flo Control Valve Services Ltd. Phone: 780 4000 Toll Free: 1 2356 Fax: 780 4035 Website: www.dynaﬂ o.com • • • •...
Page 20: Model Builder
Model 380 Control Valve (8 Inch Only) MODEL NUMBERING SYSTEM S A M P L E PA R T N U M B E R : 3 8 0 - 8 BF L- S V P 5 - C E S4...

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