gate valve lapping procedure

Gate Valve Lapping - Kemet

2021-11-23  Component/Material: Gate Valve Seat. The gate and seat were both supplied in a ground condition. A work-holder was made so that the gate would rotate within the conditioning ring when lapping. No additional pressure was added to the gate and using the recommended process, a stock removal rate of 0.5µm / minute was achieved.

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GATE, GLOBE CHECK VALVES ASSEMBLY

2017-6-23  Gate Valves ... Lubricate the spindle-threading portion and operate the valve 2/3 times. Procedure for repairs to seat and wedge/plug surface: ... Rectification of seat surface is same as specified in Gate and Globe Valve After lapping disc seat ring, assemble the hinge/bracket/disc assembly as before and also ...

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INSTRUCTION MANUAL FOR INSTALLATION,

2020-12-9  C. REPAIR OF GATE VALVES . 1. Valve Disassembly. Have replacement gasket available. Shut off line pressure and remove valve from line. Unwedge the disc. Remove bonnet bolting and carefully lift bonnet assembly with disc from body. 2. Procedure for Lapping Disc. Apply Grade 80 or 120 emery cloth to flat surface. Lay disc face on abrasive and use

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A Simple DIY Guide to Valve Lapping

Give the valve stem a light layer of motor oil before placing it in the guide. Spread a touch of the grinding compound onto the edge of the valve. Once the valve is in the head, the next step is to wet the suction glass on the lapper and stick it on the valve confront. Once the lapper is getting the valve, you start the lapping procedure.

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Gate, Globe Check Valve Rev.1 - Trueline

2014-9-30  BALL VALVE ASSEMBLY AND MAINTENANCE PROCEDURE GATE, GLOBE AND CHECK VALVES ASSEMBLY AND MAINTENANCE PROCEDURE REF. DOC.MMM.GGCH2920 Rev. 1 – March 2009 4 1. Important Features of Construction Operation GATE VALVE Gate Valve comprises of taper wedge, situated in between two-body seat rings, having included angle of 8 to 10 range.

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Introduction to Gate Valve - The Process Piping

2020-4-21  Gate valves consist of three major components: body, bonnet, and trim. The body is generally connected to the piping by means of flanged, screwed, or welded

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INSTRUCTION MANUAL FOR INSTALLATION,

2015-6-1  a. installation adjustment and test of crane gate, globe and 1 swing check valves 1. installation 2. adjustment and test b. lubrication and maintenance of crane gate and globe valves 2 - 4 1. lubrication 2. maintenance (packing gland) 3. maintenance (injection type) c. repair of gate valves 2 - 3 1. valve disassembly 2. procedure for lapping disc

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S , INSTALLATION A MAINTENANCE PROCEDURES

2017-7-13  GATE VALVE “O.S.” “Y” ... To replace the stem when the valve is completely disassembled for general maintenance follow this procedure: - Open the valve half way and remove bonnet bolts and nuts. ... Defects having a depth exceeding 0.8 mm (1/32") cannot be repaired by lapping. In this case, parts must be replaced.

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PRECISION LAPPING AND POLISHING SYSTEMS

2016-8-26  KEMET LAPPING MACHINE 48/56 MODELS 4 Kemet.co.uk Kemet 48/56 Models Option Open Face Pneumatic Lift Machine Model 48 56 Height (H) 1010 mm 1030mm 2350 mm 2260 mm Working Height (WH) - - 1390 mm 1400 mm Width (W) 1510 mm 1700 mm 1510 mm 1700 mm Depth (D) 2000 mm 2020 mm 2520 mm 2520 mm Approx. Weight 3400kg 4100kg 4000kg 5000kg Lapping

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VALVE GRINDING LAPPING EQUIPMENT

2017-7-3  Orbit 64 Valve grinder The ORBIT 64 is a robust, grinding and lapping machine for ‘in-situ’ or ‘in-shop’ repair of damaged valve seats. The unique set up and construction makes the versatile ORBIT 64 suitable for all sorts of vertical seats (Gate-, Parallel slide-, Check Valves) and

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A Simple DIY Guide to Valve Lapping

Give the valve stem a light layer of motor oil before placing it in the guide. Spread a touch of the grinding compound onto the edge of the valve. Once the valve is in the head, the next step is to wet the suction glass on the lapper and stick it on the valve confront. Once the lapper is getting the valve, you start the lapping procedure.

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Gate Valve Repair (A9101) - eCubed

Procedures for disassembling, inspecting, and measuring valve parts and procedures for lapping the disc and checking seat contact are also covered. Objectives. Identify the parts of a gate valve and describe their functions. Inspect a valve and make adjustments to stop leakage. Position rising stem and non-rising stem valves to the half-open ...

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Valve Grinding Essential Procedure - LarsLap System

2021-11-17  Valve reconditioning can be carried out in-situ, with the valve still fitted to the pipeline system, or in the workshop. In-situ valve lapping and repair tends to be more efficient as it eliminates the need to remove the valve from the system. The only time workshop maintenance is more efficient is when a major valve rebuild Is required.

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S , INSTALLATION A MAINTENANCE PROCEDURES

2017-7-13  GATE VALVE “O.S.” “Y” ... To replace the stem when the valve is completely disassembled for general maintenance follow this procedure: - Open the valve half way and remove bonnet bolts and nuts. ... Defects having a depth exceeding 0.8 mm (1/32") cannot be repaired by lapping. In this case, parts must be replaced.

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Operation Instruction Manual - HP Valves

2018-1-11  valve or related product, except as sanctioned and/or authorized in writing by HP Valves. VI Extreme care should be taken to ensure that the arrow located on the valve-body of all globe and check valves, and possibly for gate valves, is pointing in the same direction as

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TRAINING MANUAL ON VALVES - Fluid Control Solutions

2020-4-11  12.4.1 Lapping of Valve Discs 160 12.4.2 Seat Lapping Plate 161 12.4.3 Lapping of Wedge (Gate Valve) 161 12.4.4 Machining of Disc 163 12.4.5 Tips on Lapping Procedure 163 12.5 Recommended Lapping Compounds for Lapping 164 Valve Seats 12.6 Over Hauling Safety Valves 164 12.6.1 General 164 12.6.2 Safety Valve Floating 165 12.7 Overhauling a Wedge ...

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PRECISION LAPPING AND POLISHING SYSTEMS

2016-8-26  KEMET LAPPING MACHINE 48/56 MODELS 4 Kemet.co.uk Kemet 48/56 Models Option Open Face Pneumatic Lift Machine Model 48 56 Height (H) 1010 mm 1030mm 2350 mm 2260 mm Working Height (WH) - - 1390 mm 1400 mm Width (W) 1510 mm 1700 mm 1510 mm 1700 mm Depth (D) 2000 mm 2020 mm 2520 mm 2520 mm Approx. Weight 3400kg 4100kg 4000kg 5000kg Lapping

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VALVE GRINDING LAPPING EQUIPMENT

2017-7-3  Orbit 64 Valve grinder The ORBIT 64 is a robust, grinding and lapping machine for ‘in-situ’ or ‘in-shop’ repair of damaged valve seats. The unique set up and construction makes the versatile ORBIT 64 suitable for all sorts of vertical seats (Gate-, Parallel slide-, Check Valves) and

Read More

CAST STEEL VALVES - Macomb Group

2018-6-29  Gate valves should be installed and welded into the pipeline with the wedge or disc in the fully closed position. If the valve is left open or partially open, it could distort and leak during operation. Also, leaving the valve in a fully closed position helps prevent weld spatter from falling directly onto the mating faces of the seats. The ...

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FLAT SURFACE LAPPING: PROCESS MODELING IN AN

2011-11-10  FLAT SURFACE LAPPING: PROCESS MODELING IN AN INTELLIGENT ENVIRONMENT Owat Sunanta, Ph.D. University of Pittsburgh, 2002 The process of lapping has been long considered an art due to the tremendous amount of variability and subjectivity involved. The quality of lapping differs from operator to operator and the results are highly inconsistent.

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Valve Grinding Essential Procedure - LarsLap System

2021-11-17  Valve reconditioning can be carried out in-situ, with the valve still fitted to the pipeline system, or in the workshop. In-situ valve lapping and repair tends to be more efficient as it eliminates the need to remove the valve from the system. The only time workshop maintenance is more efficient is when a major valve rebuild Is required.

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Device for grinding and lapping of sealing surfaces of valves

A device for lapping of sealing surfaces with the same faceplate with the tools at its periphery in an annular row (see catalogue sheet of the company "EFCO", Germany), where for lapping sealing surfaces of wedge gate valves use a generic from above the surface of the horizontal position using the tilt table.

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Operation Instruction Manual - HP Valves

2018-1-11  valve or related product, except as sanctioned and/or authorized in writing by HP Valves. VI Extreme care should be taken to ensure that the arrow located on the valve-body of all globe and check valves, and possibly for gate valves, is pointing in the same direction as

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Instruction Manual for Bellow Seal Valves

2020-5-7  Instruction Manual for Bellow Seal Valves ... Gate valve in cast construction. ... After the defect/machine tool mark diminishes follow the above lapping process using the fine paste 8. Once the fineness is achieved, check the mating area of sealing surface by applying stainer,

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TRAINING MANUAL ON VALVES - Fluid Control Solutions

2020-4-11  12.4.1 Lapping of Valve Discs 160 12.4.2 Seat Lapping Plate 161 12.4.3 Lapping of Wedge (Gate Valve) 161 12.4.4 Machining of Disc 163 12.4.5 Tips on Lapping Procedure 163 12.5 Recommended Lapping Compounds for Lapping 164 Valve Seats 12.6 Over Hauling Safety Valves 164 12.6.1 General 164 12.6.2 Safety Valve Floating 165 12.7 Overhauling a Wedge ...

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CAST STEEL VALVES - Macomb Group

2018-6-29  Gate valves should be installed and welded into the pipeline with the wedge or disc in the fully closed position. If the valve is left open or partially open, it could distort and leak during operation. Also, leaving the valve in a fully closed position helps prevent weld spatter from falling directly onto the mating faces of the seats. The ...

Read More

PRECISION LAPPING AND POLISHING SYSTEMS

2016-8-26  KEMET LAPPING MACHINE 48/56 MODELS 4 Kemet.co.uk Kemet 48/56 Models Option Open Face Pneumatic Lift Machine Model 48 56 Height (H) 1010 mm 1030mm 2350 mm 2260 mm Working Height (WH) - - 1390 mm 1400 mm Width (W) 1510 mm 1700 mm 1510 mm 1700 mm Depth (D) 2000 mm 2020 mm 2520 mm 2520 mm Approx. Weight 3400kg 4100kg 4000kg 5000kg Lapping

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VALVE TYPES AND SYMBOLS - Fluid Control Solutions

2020-4-11  Gate Valves A gate valve can be used for a wide variety of fluids and provides a tight seal when closed. The major disadvantages to the use of a gate valve are: It is not suitable for throttling applications. It is prone to vibration in the partially open state. It is more subject to seat and disk wear than a globe valve.

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What is A Gate Valve and How Does It Works? An-Overview

2021-11-13  A gate valve controls the flow of fluids by raising (opening) and lowering (closing) the disk or gate. Sluice or gate valve includes in the most common types of valves that use in different process plants. This is a linear motion valve that is used to stop or start the flow of fluids. These types of valves use for fully closed or fully opened ...

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Valve Grinding Machines - Kemet

2021-11-16  Portable Valve Grinding Machines. The Larslap range of portable industrial valve grinders offered by Kemet are a patented design concept that are a proven solution for on-site valve reconditioning. Repairing leaking valves in industrial pipelines is a laborious operation involving extended downtime, production losses and substantial unwanted costs.

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