American Standard Stainless Steel Gate Valves

Definition

Z41H Stainless Steel American Standard Gate Valve is a manual shut-off valve designed in strict accordance with API 600 and other American standards. It adopts flanged connection, outside screw & yoke, single wedge disc structure and metal hard seal design. Driven by a handwheel, the gate disc moves vertically to the flow direction to accurately control the on-off of pipeline media.

The valve body is made of 304 or 316 stainless steel, fully compatible with American standard pressure ratings and flange dimensions. Featuring reliable sealing and stable structure, it is widely used in medium and high-pressure working conditions in petroleum, chemical, power and other industries, especially suitable for conveying systems of water, steam, oil and medium-light corrosive media.

With standardized design and excellent compatibility, American Standard Stainless Steel Gate Valves can be directly connected to American standard pipelines without additional modification, greatly reducing installation and maintenance costs.

Core Technical Parameters

Model Interpretation

The meaning of each letter and number in model Z41H is clear for buyers to quickly identify specifications:

● Z: Gate Valve, defined as the main valve type for pipeline on-off control, suitable for American standard conditions.

● 4: Flanged Connection, conforming to ASME B16.5 / ASME B16.47, with firm connection.

● 1: Outside Screw & Yoke, Single Wedge Disc, smooth operation, easy to observe status and maintain.

● H: Seat Face Overlayed with Hard Alloy, highlighting wear resistance, erosion resistance and reliable sealing.

Core Attributes

● Structure: Outside Screw & Yoke, Rigid Wedge Disc, stable structure, smooth lifting without jamming.

● Connection: American Standard Flanged Connection (ASME B16.5 / ASME B16.47), RF and RTJ available.

● Seal: Metal hard seal with hard alloy overlay, zero leakage, meets API 600.

● Actuation: Manual (standard), electric or pneumatic (optional) for automation.

● Material: 304 / 316 stainless steel, excellent corrosion resistance.

● Pressure: Class 150 / 300 / 600 / 900 for medium and high-pressure service.

● Size: NPS ½"–NPS 36" (DN15–DN900), standard range DN15–DN600.

Component Materials

● Valve Body / Bonnet: 304 (ASTM A351 CF8), 316 (ASTM A351 CF8M) stainless steel.

● Seal Face: Stainless steel with Stellite overlay, wear-resistant and high-temperature resistant.

● Valve Stem: 304/316 stainless steel, quenched and nitrided for high strength.

● Disc: Stainless steel substrate with hard alloy overlay, tough and wear-resistant.

● Gland Packing: Flexible graphite + PTFE, high temperature and corrosion resistant.

● Handwheel: Carbon steel with coating; stainless steel available for corrosive service.

Design & Manufacturing Standards

● Gate Valve Design: API 600

● Face-to-Face: ASME B16.10

● Flange Dimensions: ASME B16.5, ASME B16.47

● Pressure-Temperature Rating: ASME B16.34

● Inspection & Test: API 598

Selection & Installation Points

Selection Points

● Choose 316 for strong corrosive / chloride media, 304 for general corrosion.

● Match pressure class accurately; check wall thickness for Class 300 and above.

● Manual for small / low-frequency pipelines; electric / pneumatic for automation.

● Use ASME standard sizes for direct matching with American pipelines.

Installation Points

● Reserve sufficient space for stem lifting and handwheel operation.

● Tighten flange bolts symmetrically and evenly per ASME specifications.

● Conduct shell and seal tests before installation.

● Clean impurities, welding slag and oil in the pipeline before installation.

Product Advantage Summary

Z41H American Standard Stainless Steel Gate Valves are manufactured strictly in accordance with API 600 and other American standards, designed for medium and high-pressure applications in petroleum, chemical, power and other industries.

With high-quality stainless steel and metal hard seal structure, the valves provide reliable sealing, easy operation and long service life. They are fully compatible with American standard pressure ratings and flanges, enabling direct pipeline connection without modification.

Featuring complete specifications, flexible actuation and optional materials, they effectively solve pain points such as poor compatibility, insufficient sealing and short service life. It is a reliable solution for on-off control in American standard pipeline systems.