GOST Standard PN40 DN150 Flanged Cast Steel Globe Valve

Built strictly to GOST 5762 mechanical design rules and GOST 3706 face-to-face dimensions, Hanno's GOST Standard PN40 DN150 Flanged Cast Steel Globe Valve incorporates an A105 forged steel disc overlayed with 13Cr stainless steel to prevent high-velocity seat cavitation. Each unit undergoes 100% hydrostatic testing and spectral verification under Russia TC 010/032 EAC standards.

Unique Engineering: GOST PN40 Flange Compatibility & Machining

Integrating new replacement valves into existing Eurasian piping networks often fails due to improper flange bolt pitch, incorrect raised face height, or mismatched gasket seating area dimensions. Hanno Valve GOST Standard PN40 DN150 Flanged Cast Steel Globe Valve solves this field installation hazard through dedicated CNC flange profiling and custom metallurgy:

• Precision Bolt Pattern Turning

Flange outer dimensions, bolt circle diameters (PCD), and bolt hole counts strictly conform to GOST 33259-2015 Type B (PN40) specification tables. Our 4-axis vertical CNC lathes machine flange faces in a single setup, ensuring perfect perpendicularity between the flange face and the pipeline axis to eliminate installation stress.

• Serrated Raised Face Profile

The raised face (RF) contact surface features a controlled concentric ring serration finish. This geometry optimizes seating stress on 304+flexible graphite spiral wound gaskets (Part #5), securing a zero-leakage seal under 4.0 MPa continuous working pressure.

• In-House 25L Cast Steel Integrity

Unlike suppliers who purchase raw unverified castings from third-party foundries, Hanno pours all 25L carbon steel valve bodies inside our 18,000㎡ Lishui foundry using advanced precoated sand technology. This process eliminates micro-porosity, sand inclusions, and internal wall shrinkage, ensuring the PN40 shell withstands intense hydrostatic pressure testing up to 6.0 MPa without structural deformation.

Detailed Materials Breakdown & Component Specifications

Manufacturing & Quality Inspection Protocol

1. Raw Metal Spectrographic Verification: Every melt of 25L carbon steel inside our electric furnace is analyzed via optical emission spectroscopy to verify chemical composition (C, Mn, Si, S, P) prior to pouring.

2. Precision Machining on CNC Centers: Body neck threads, flange sealing faces, and disc guide channels are machined on four-axis vertical and horizontal CNC centers to achieve tight dimensional tolerances.

3. 100% Hydrostatic & Pneumatic Pressure Testing: Every GOST Standard PN40 DN150 Flanged Cast Steel Globe Valve undergoes 1.5x nominal pressure (6.0 MPa) shell testing and 1.1x nominal pressure (4.4 MPa) seat closure testing per GOST 9544 requirements before painting.

Frequently Asked Questions (FAQ)

Can this GOST PN40 DN150 valve replace older Soviet-era J41W series globe valves directly?

Yes, face-to-face dimensions strictly follow GOST 3706, allowing direct drop-in replacement on existing pipelines without pipe cutting or flange modifications.

Is the seating surface repairable while the valve body remains welded inline?

Yes, the top-entry bolted bonnet allows maintenance crews to remove the internal stem and disc assembly, inspect the 13Cr seat overlay, and re-grind sealing faces in the field.

What official certifications are provided with Hanno's GOST globe valves?

Each GOST Standard PN40 DN150 Flanged Cast Steel Globe Valve includes EN 10204 3.1 Material Test Certificates (MTC), Russia TC 010/032 EAC certificates of conformity, ISO9001 quality reports, and 100% hydrostatic test inspection logs.