Forged steel hard seal gate valve threaded connection

Z11YForged steel hard seal gate valve threaded connectionProduct Introduction

There are three types of valve cover designs for forged steel gate valves. *The type is a bolt type valve cover. Valves designed in this form have their valve body and cover connected by bolts and nuts, and sealed with wrapped gaskets (made of 316 clip flexible graphite). When customers have special requirements, metal rings can also be used for connection. The second design form is a welded valve cover. According to this design form, the valve body and valve cover are connected by threads and fully welded sealed. When customers have special requirements, full penetration welding can also be used. The third type is the pressure self tightening valve cover. Valves designed in this form have a threaded connection between the valve body and the valve cover, and are sealed with an internal pressure self sealing ring.

Application scope:

Forged steel gate valves are suitable for small-diameter pipelines with Class 150~Class 2500 and working temperatures of -29 ℃~425 ℃ (carbon steel) or -29 ℃~500 ℃ (stainless steel). They are used to cut off or connect media in pipelines. Different materials are selected and can be applied to various media such as water, steam, oil, nitric acid, acetic acid, oxidizing media, urea, etc.

Structural features:

1. Forged steel gate valves have low fluid resistance, and their resistance coefficient is equal to that of pipe sections of the same length.
2. The product structure of forged steel gate valves is simple, small in size, and lightweight.
3. Tight and reliable, currently gate valves have good sealing performance and have been widely used in vacuum systems.
4. Easy maintenance, simple gate valve structure, and easy disassembly and replacement.

Forged steel gate valves often overlook pressure issues. During the grease injection operation, the pressure of the semi free floating ball steam trap varies rhythmically with peaks and valleys. Low pressure, seal leakage or safety valve failure, high pressure, blockage of the grease injection port valve manufacturer, hardening of the grease inside the seal, or locking of the sealing ring with the valve ball or valve plate. When the grease injection pressure is usually too low, the injected lubricating grease tends to flow into the bottom of the valve chamber, usually occurring in small gate valves. If the pressure of the grease injection flow control valve is too high, on the one hand, check the insulation gate valve and grease injection nozzle. If it refers to the blockage of the remote control float valve hole, determine the situation and replace it with a spring seal with a wrench fully open condition; On the one hand, the plunger globe valve is hardened with grease, which requires the use of cleaning solution to repeatedly soften the failed sealing grease and inject new lubricating grease for replacement. In addition, the sealing model and sealing material also affect the grease injection pressure. Different sealing forms have different grease injection pressures, and in general, the grease injection pressure of hard seal gate valves is higher than that of soft seal gate valves.

Z11Y forged steel hard seal gate valve thread

Standard specifications:

Design and Manufacturing Standards: JB/T 7746, API602

Structural length standard: GB/T 12221-2005
Connection flange standard: GB/T 9113
Socket welding standards: JB/T 1751, ASME B16.11
Threaded connection standards: GB 7306, ASME B2.1
Pressure and temperature rating: GB/T 12224-2005
Test and Inspection Standard: GB/T 13927-2008

Part materials and working conditions:

Attention: Customer requirementsdecision

Main dimensions and weight: