gate valve lapping procedure

Gate Valve Lapping - Kemet

Gate Valve Lapping. Gate Valves or Sluice Valves are widely used within the oil and gas sectors to control the flow of fluids and gases. They are rarely used to regulate the flow, more commonly, they are a simple but effective way of either shutting off flow, or fully …

INSTALLATION, OPERATION, & MAINTENANCE OF BERIC …

Disassemble the valve, using the procedure described in this manual, and repair the valve seat surface, by lapping, etc. Lapping of the sealing surfaces, must be performed by a qualified valve repair shop and is beyond the scope of this manual. INSTALLATION, OPERATION, & MAINTENANCE OF BERIC GATE VALVES

Ball Valve Repair 101 - Valve Magazine Web Site

From time to time, we are re-posting well-received or particularly valuable articles that have previously run on VALVEMagazine.com so that those who might have missed them will be able to catch up on the best of the best. This article, “Ball Valve Repair 101” initially ran on June 23, 2014.

Valve Lapping | AnandTech Forums: Technology, Hardware ...

Sep 30, 2011· 3- the real test of valve seats is called a LEAKDOWN TEST. Lapped valves on uncut seats tend not to pass this. A fresh valve seat and ground valve will. 4- a properly cut seat and valve do not require lapping to seal. 5- valve lapping is still performed, primarily to verify concentricity and contact location on the valve.

S , INSTALLATION A MAINTENANCE PROCEDURES

It is recommended that the face of the disc be blued to check for contact of seating surface after final lapping. For re-assembly of valves use the procedure outlined under para. 2.4. STORAGE, INSTALLATION AND MAINTENANCE PROCEDURES GATE VALVE “O.S.” & “Y” (CONTINUED)

VM1700-1900 Gate Valve Grinding & Lapping Machine ... - …

Feb-06 / VM1700-1900 Gate Valve Grinding & Lapping Machine Brochure Gate Valve Grinding & Lapping Machine Brochure Page 7 of 7 TWIN Machines for Gate and Globe Valves Range: 8”-48”(200-1200 mm) Diameter P/N Description Gate Valve Grinder VM1700ST • Includes The VM1700S and the Globe valve conversion

LAPPING VALVE SEATING SURFACES - us-products.com

through 12 and continue with the lapping procedure using the “P” compound in step 13. Step 15: As part of the final inspection, measure the nozzle seat width with the 7x measuring magnifier according to the valve manufacturer’s instructions, if any. SUCCESS STRATEGIES Keep the following in mind when lapping valve discs or nozzle seats:

Valve Repair - ITC Learning

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 ...

EFCO USA, Inc. - Portable valve grinding/lapping equipment ...

Portable Valve Repair & Testing Equipment for gate, globe, check, control & safety valves & other sealing surfaces: portable Flange Facer machines, Test Benches, Single Point Boring Machines, Gate Valve Grinders, Globe Valve Grinders, Lapping

INSTRUCTION MANUAL FOR INSTALLATION, OPERATION …

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 3. procedure for lapping seat ring 4. procedure for making up bonnet joint 5. reassembly d. repair of globe valves 3 1.

How Do I Repack a Leaking Gate Valve? | Hunker

May 24, 2018· The water supply to the gate valve should be turned off at the main valve, which is usually found up the water stream from where the leaking valve is located. Open the faucet fully and place a wrench beneath the packing nut of the gate valve. Put a second wrench on the valve while turning the first wrench to remove the valve assembly.

procedure how to valve grinding - Mine Equipments

AGK - Valve Lapping - Affordable Go Karts This is a great procedure to use on all types of engines. When rebuilding an engine, lapping the valves can restore their seal to the valve seat. Lapping the ...

INSTRUCTION MANUAL FOR INSTALLATION, OPERATION …

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

Zero Seat Leakage Tolerance - Power Engineering

As the valve is maintained the flat seat lapping/grinding process on the hard face will result in widening the valve seat. On gate valve seats, this removal of hard face causes the wedge to drop ...

Gate, Globe & Check Valve Rev.1 - Trueline

BALL VALVE ASSEMBLY AND MAINTENANCE PROCEDURE GATE, GLOBE AND CHECK VALVES ASSEMBLY AND MAINTENANCE PROCEDURE REF. DOC.MMM.GGCH2920 Rev. 1 – March 2009 1 GATE, GLOBE & CHECK VALVES ASSEMBLY & MAINTENANCE ... Minor scratches should be removed by lapping with emery paste with the help of body seat lapping fixture.

CAST STEEL VALVES - Valve Repair - Butterfly Valves

VEL–CSVM–2002 CAST STEEL VALVES MAINTENANCE MANUAL, Bolted Bonnet Gate, Globe, Parallel Slide and Check Valves 2–60”, (50–1500 mm) Maintenance

Operation and Maintenance of different valve types

The common overhaul procedure of a plate valve is: • Pre-cleaning of dirty valves. Some valves out of HPI compressors need special cleaning methods. ... Lapping of valve seats required no no yes Machining of valve seats no yes yes Limited valve seat lifetime due to rework

Valve Lapping and Grinding Equipment - Dupill Group Companies

Valve Lapping and Grinding Equipment. The LarsLap valve lapping system comprises a number of basic models that cover virtually every type of valve, from 1/4" to 52" (8mm - 1300 mm) in diameter.

Gate valve lapping - YouTube

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HVA GATE VALVE MAINTENANCE AND ADJUSTMENT …

GATE VALVE MAINTENANCE AND ADJUSTMENT PROCEDURE Valve Maintenance Manual 3 I. VITON GATE AND BONNET O-RING STD AND MSB 0.625” – 21” GATE VALVES A. Tools and Materials Required: 1. Allen Wrench for 1 ½”—14” Gate Valves 2. ½” Box Wrench for 16”—21” Gate Valves 3. O-Ring Pick 4. Rubber Gloves 5. Grease – Apezion L O-Ring ...

VALVe mAchInInG And TesTInG TechnoLoGY - unigrind.de

07 porTABLe GrIndInG & LAppInG mAchInes unigrind VenTA options: • Lapping equipment (lapping paste and lapping disks) • Micro finishing film abrasives grit P80–1800 and 4000 • Working depth extensions • slight changes in working range • customized grinding tools • Additional tools for grinding gate valve seats with VenTA 150 in work shop

Weir Power & Industrial

Weir Power & IndustrialFirst choice for power and industrial protection 5 Hopkinsons FULL BORE & VENTURI PARALLEL SLIDE GATE VALVES PI-0309 Volume production of gate valves for low/ medium general purpose industrial duties. Full bore parallel slide gate valves in low carbon steel for a nuclear power plant. The Hopkinsons Full Bore & Venturi ...

CALDER Valve Testing Systems by CLIMAX Portable

The CALDER Valve Test System Can Grow & Evolve with YOUR Business! The new lineup of CALDER advanced valve testing systems, manufactured by CLIMAX, are the most flexible and versatile systems on the market.The CALDER test system can seamlessly expand and evolve with your business, giving you the lowest total cost of ownership (TCO) and the highest return on investment (ROI) over the life …

GATE, GLOBE & CHECK VALVES ASSEMBLY & MAINTENANCE …

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 …

Valve Grinding Machines | Lapping Machines | Climax Portable

Valve Grinding & Lapping Machines. Lightweight for easy handling and installation, our valve grinding and lapping machines span working ranges for gate valves from 1.3 to 39.4 inches (32 to 1000 mm). During operation, you can quickly change grinding disks and adjust the grind pressure.

Need of Lapping Machine for Valve Component: A Case Study

III. NEED OF LAPPING FOR VALVE COMPONENT Valve lapping is a essential part of maintenance work that often interrupt production work. Repairing leaking valve in industry is a laborious operation involving extended downtime, production losses and substantial unwanted cost. The given figure shows different parts of a gate valve.

VALVE REPAIR EQUIPMENT Products - Ventil

valve repair equipment back to valve test & repair equipment. polir. hand-controlled, battery driven grinding and lapping machine for flat and conical seats. more. orbit. portable grinding and lapping machine for gate, parallel slide, check and safety and globe valves. more. pro-dual. stationary grinding and lapping machine. more. titan ...

Valve Repair Machines Selection Guide | Engineering360

Gate valve grinding table: This construction is used for grinding the surface of valve disks, gate valve wedges, and other machine elements. The table plate speeds are fully adjustable. Slide valve grinding and lapping: The primary function of the equipment is to level sealing surfaces and eliminate scaling, rust, and conglutinations. This ...

Valve Lapping Machine for Internal Combustion Engines

1 Valve Lapping Machine for Internal Combustion Engines Pitigala A.G.Abeysekara1 1School of Technology, University of Wolverhampton Abstract Automobile maintenance is …

Installation, Operation, and Maintenance Manual

• The seal is retained in the valve body by its trapezoidal shape. • A relief has been cast into the valve body behind the seal. 1 2 Figure 4: Valve open 1. Seat flush 2. Relief 1 2 Figure 5: Valve closed 1. Gate 2. Seat pushed into relief Product Description C67 Bi-Directional Knife Gate Valve Installation, Operation, and Maintenance Manual 7

Valve Lapping Tools & Accessories | Dupill Group

The LarsLap patented valve lapping tools are a proven solution for in-line valve reconditioning. These portable, mechanically driven tools are available in four overlapping sizes that cover almost all types of valves, from 1/4" to 52" in diameter. The valve lapping equipment is versatile and offers exceptional ease of handling and operation.

V6Z24 | How-To - Valve Lapping

What lapping does is makes the valves seat like new again. when the valve is closed and theres not a perfect seal you loose compression. Lapping the valves restores this. this is a great thing to do if your doing a hybrid since you will have the heads off anyways. on high mileage engines its recommended to take the valves in to be gound before ...

Manual No. 1878-DD INSTRUCTION MANUAL for ½ thru 2 …

9.3 Lapping Procedure After the valve has been disassembled, a visual inspection of the seating surfaces of the Discs (004) and Seat Rings (013) can be made to determine if lapping is necessary to remove any minor scratches on these parts prior to assembling the valve. The following procedure should be followed: