Leakage of packing and valve body and bonnet junction leakage treatment methods

Leakage of filler and connection between valve body and bonnet (1) Leakage of packing leakage and reasons: Packing seal principle: The axial force applied to packing, plastic deformation of packing, the valve due to multiple packing installed, the parts alternately contact each other to form "Labyrinth effect", play a role in preventing leakage of pressure medium outside. In addition to the filler leakage under different pressures and media penetration, the filler of the contact pressure is not enough, there are the aging of the filler itself, the stem of the injury and other reasons. The packing corrodes the valve stem so that when the pressure leaks out of the media along the contact gap between the packing and the valve stem until it leaks from the packing, otherwise the valve is bent excessively with excessive force. Filler improper selection, impatience media corrosion, impatience high pressure or vacuum, high temperature and low temperature. Filler over the service life, aging, loss of elasticity Packing insufficient number of methods of treatment: should be selected according to working conditions, packing materials and materials; pre-packing, the correct installation and determine the number of packing; stem bending, surface corrosion mechanical repair or replacement; Filler failure must be replaced.

Knob Switch

The classification mainly includes the aluminum or zinc alloy die casting Machinery Parts using in Knob area.
In the die casting process,higher specific pressure is required, so that higher filling speed can be obtained.which is beneficial for alloy to overcome mold filling resistance.and effectively fill each part of the cavity.The Casting General Tolerance is Grade GB-CT4.
Process Technology: High pressure die casting,NC Machining,Spray Coating
Product Dimensions: Customized
Casting General Tolerance: Grade GB-CT4
Flow Processes: Die casting,Degating,Polishing,Deburring,CNC Turning,Cleaning,Packaging,Storaging,Shipping
Control Measure: Incoming Material Test, First Article inspection,Routing inspection,Final item inspection,and Outgoing quality control
Inspection Equipment: CMM, Caliper, Plug Gage, Screw Gauge,spectrometer, roughness meter, hardness meter, measuring projector, tensile test machine, pneumatic measuring tool, self-design leak test machine
Application: Hardware Parts
Certificate: IATF16949:2016,ISO14001:2015,ISO45001:2018
Lead Time: 30-35 days
Trade Term: FOB Ningbo

Aluminum Die Casting Knob Switch Parts,Zinc Die Casting Knob Switch Parts,ADC12 Die Casting Knob Switch Parts

NINGBO ZHENHAI BOLANG METAL PRODUCTS FACTORY , https://www.casting-part.com