Parr-instrument Bottom Drain Valves Manuel d'utilisateur télécharger pdf

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Operating & Maintenance Instruction Manual 490M

Bottom Drain Valves

Models A465VB, A465VB2, A485VB, A485VB2 & A560VB

Description

The Parr Instrument Company bottom drain valve is a rising stem, process sampling valve. In the closed position,

the stem of the valve is flush with the inside bottom of the vessel so that there is a minimum of dead space

between the bottom of the vessel and the shut off point of the valve. In the fully open position, the stem is retracted

completely to open a clear passage from the vessel. When the valve is re-closed, any material in this passage will

be pushed back into the reactor by the rising stem. As the plunger moves to the closing end of the stroke, a seal is

established as the plunger contacts the compression ring and compresses the seal.

Installation and Operation

These valves are designed to be installed in the bottom of Parr cylinders that are machined specifically for

installation with a minimum of dead space. Pipe thread sealant tape should be applied to the valve body threads

and then installed turning clockwise into the cylinder. The valve should be tightened sufficiently to seal the pipe

threads and bring the stem of the valve approximately even with the inside bottom of the cylinder.

The valve is opened by turning the handle counterclockwise. The more turns open; the valve will provide a larger

passage for product flow.

The valve is closed by turning the handle clockwise until the plunger meets the compression ring and compresses

the seal.

Typical torque values on the valve handle required to seal the valves are as follows:

A465VB 10 – 15 ft/lbs

A465VB2 10 – 15 ft/lbs

A485VB 5 – 10 ft/lbs

A485VB2 5 – 10 ft/lbs

A560VB 15 – 20 ft/lbs

Significantly more torque should not be required to seal the valves. If the valve is leaking, it is a good indication

that the seal is worn or has been damaged. The valve should be disassembled, inspected, cleaned as required

and seals replaced.

Disassembly of the Bottom Drain Valves

1. Retract the plunger to the fully open position by turning the handle counterclockwise.

2. Loosen the jam nut from the valve body by turning it counterclockwise in relation to the valve body.

3. Loosen the retainer by turning it counterclockwise in relation to the valve body until its threads are clear of the

valve body.

4. Pull the plunger, handle, and retainer out of the valve body together.

5. Remove the lower compression rings and seal. Inspect these parts for wear and replace if necessary.

6. Remove the support pin from the valve body.

7. Remove the upper compression ring and seal. Inspect these parts for wear and replace if necessary.

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Résumé du contenu

Page 1 - Bottom Drain Valves

- 1 - Operating & Maintenance Instruction Manual 490M Bottom Drain Valves Models A465VB, A465VB2, A485VB, A485VB2 & A560VB

Page 2 - Operating Instruction Manual

Bottom Drain Valves Models A465VB, A465VB2, A485VB & A560VB Operating Instruction Manual - 2 - Assembly of Bottom Drain Valves 1. Before a

Page 3 - * Available in other alloys

Bottom Drain Valves Models A465VB, A465VB2, A485VB & A560VB Operating Instruction Manual - 3 - A465VB * Available in other alloys

Page 4

Bottom Drain Valves Models A465VB, A465VB2, A485VB & A560VB Operating Instruction Manual - 4 - A465VB2 * Available in other alloys

Page 5

Bottom Drain Valves Models A465VB, A465VB2, A485VB & A560VB Operating Instruction Manual - 5 - A485VB * Available in other alloys

Page 6

Bottom Drain Valves Models A465VB, A465VB2, A485VB & A560VB Operating Instruction Manual - 6 - A485VB2 * Available in other alloys

Page 7

Bottom Drain Valves Models A465VB, A465VB2, A485VB & A560VB Operating Instruction Manual - 7 - A560VB * Available in other alloys

Page 8 - PARR INSTRUMENT COMPANY

Revision 01/24/08 PARR INSTRUMENT COMPANY 211 Fifty-Third Street Moline, Illinois 61265 USA 309/762-7716 800/872-7720 Fax 309/762-9453 http:

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Parr-instrument Bottom Drain Valves Manuel d'utilisateur

Naviguer en ligne ou télécharger Manuel d'utilisateur pour Instruments de mesure Parr-instrument Bottom Drain Valves. Parr Instrument Bottom Drain Valves User Manual Manuel d'utilisatio

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Parr-instrument Bottom Drain Valves Manuel d'utilisateur

Naviguer en ligne ou télécharger Manuel d'utilisateur pour Instruments de mesure Parr-instrument Bottom Drain Valves. Parr Instrument Bottom Drain Valves User Manual Manuel d'utilisatio

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