RZ47F / RZ43F Gas Plate Gate Valve
RZ47F / RZ43F Gas Plate Gate Valve
  1. RZ47F / RZ43F Gas Plate Gate Valve
  2. RZ47F / RZ43F Gas Plate Gate Valve

RZ47F / RZ43F Gas Plate Gate Valve

  • • Gas plate gate valve designed specifically for natural gas, LNG, and coal gas pipelines
    • Two types: RZ47F (non-rising stem) and RZ43F (rising stem), PN10–PN40
    • Floating O-ring seat with preloading force ensures zero-leakage sealing at both ends
    • Self-cleaning disc design prevents abrasive erosion and extends service life
    • Full-bore design allows pigging/pipeline cleaning when fully open

Gaoshan Valve — RZ47F / RZ43F Gas Plate Gate Valve

Model: RZ47F / RZ43F  |  Pressure: PN10 ~ PN40  |  Connection: Flanged  |  Medium: Natural Gas, LPG

Pressure Class
PN10 – PN40
Size Range
DN50 – DN1000
Temperature
−29°C ~ 121°C
Body Material
WCB Cast Steel
Applicable Medium
Natural Gas
Liquefied Petroleum Gas (LPG)
Coal Gas
Oil Products
Core Strengths
Zero-Leakage Floating O-Ring Seat
Floating seat design with O-ring sealing and preloading force ensures reliable bi-directional zero-leakage shut-off for gas media, solving traditional problems of hard operation caused by gas solidification.
Self-Cleaning Disc Mechanism
Special self-cleaning design automatically removes debris from the disc surface during each opening/closing cycle. Sealing faces remain protected from abrasive erosion throughout the valve’s service life.
Full-Bore Pigging Capability
Full-bore passage allows pipeline pigging and ball cleaning when the valve is fully open — essential for maintaining clean gas transmission lines.
Dual Stem Configurations
Available in non-rising stem (RZ47F) for underground and space-limited installations, or rising stem (RZ43F) for applications requiring visual position indication.
Product Overview

The RZ47F and RZ43F are gas-specific plate (slab) gate valves engineered exclusively for city gas pipeline networks, natural gas distribution systems, and industrial gas handling applications. Designed to address the unique challenges of gas service — including solidification-induced sticking, leakage under low pressure, and difficult operation — these valves feature a revolutionary floating O-ring seat assembly that delivers true zero-leakage performance in both directions.

Both models are constructed from WCB cast steel body and bonnet with surface-treated alloy steel disc and seat ring, 2Cr13 stainless steel stem, aluminium bronze stem nut, expanded graphite packing, and PTFE sealing rings. Available in pressure classes PN10, PN16, PN25, and PN40 across sizes DN50 through DN1000, with operating temperatures from −29°C to 121°C. The self-cleaning disc mechanism automatically removes particulates during every stroke, while the full-bore design permits pigging operations for pipeline maintenance.

Performance Specifications
Nominal Pressure PN (MPa)Shell Test (MPa)High-Pressure Seal Test (MPa)Low-Pressure Seal Test (MPa)Temperature Range (°C)Applicable Medium
PN101.51.10.6−29 ~ 121Natural Gas, LPG, Coal Gas, Oil
PN162.41.760.6
PN253.82.750.6
Main Component Materials
NOPart NameMaterial
1Valve Body, BonnetWCB Cast Steel
2Disc (Gate), Seat RingAlloy Steel (Surface Treated)
3Valve Stem2Cr13 Stainless Steel
4Stem NutAluminium Bronze
5PackingExpanded Graphite (Flexible Graphite)
6Sealing RingPTFE (Polytetrafluoroethylene)
7Sealing GreaseOil-Resistant Sealant Grease
Model Comparison — RZ47F vs. RZ43F
FeatureRZ47F (Non-Rising Stem)RZ43F (Rising Stem)
Stem TypeNon-Rising Stem (NRS) — compact heightRising Stem (RS) — visual position indicator
Best ForUnderground vaults, limited headroom spacesAbove-ground stations, position monitoring required
Pressure ClassPN4, PN10, PN16, PN25, PN40PN16, PN25, PN40
Main Dimensions — RZ47F Non-Rising Stem, PN10/PN16 (mm)
DNLHH1D0
50178450130250
65190550160300
80203610180300
100229700214300
125254798257350
150267895300350
2002921130388350
2503301290475400
3003561480547450
3503811668625450
4004061850712500
4504322080785500
5004572300880600
60050828801045—
70061030801190—
80066034901360—
90077139001510—
100081143201715—

Dimensions for RZ47F PN10/16. PN25/40 and RZ43F dimensions differ — contact us for complete dimensional tables by pressure class.

Structure Drawing

RZ47F / RZ43F Gas Plate Gate Valve — Structure DrawingRZ47F / RZ43F Gas Plate Gate Valve — Structure Drawing

Structure drawing for reference only. Contact us for certified dimensional drawings.

Design & Manufacturing Standards
GB/T 12232
GB/T 13927
API 598
API 6D
ANSI B16.5
ISO 5208
JB/T 308
Installation & Maintenance Notes
  • Install with adequate support on both upstream and downstream piping. Gas service requires proper anchoring to prevent stress transmission to the valve body.
  • Flush the pipeline thoroughly before commissioning to prevent welding slag, scale, or debris from damaging the alloy steel seat surfaces.
  • Do not use the handwheel as a lifting point — excessive force can damage the stem threads, bonnet assembly, and O-ring seals.
  • Periodically inject oil-resistant sealing grease through the grease fitting to maintain optimal O-ring lubrication and sealing performance.
  • For valves in long-term idle storage, operate the handwheel periodically (monthly recommended) to prevent seat ring seizing due to gas residue accumulation.
Typical Applications
  • City Natural Gas Distribution & Transmission Networks
  • LPG (Liquefied Petroleum Gas) Storage & Transfer Stations
  • Coal Gas Pipeline Systems & Industrial Gas Supply Lines
  • Gas Processing Plants & Refinery Off-Gas Systems
  • Underground Gas Vault & Tunnel Installations (RZ47F NRS model)
  • Gas Metering Stations & Pressure Regulating Stations
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