Short Pattern Marine Gate Valve
Short Pattern Marine Gate Valve is a critical component in shipboard piping systems, designed for tight installation spaces while providing reliable isolation service.
Its short pattern designation refers to a reduced face-to-face dimension (often per DIN 3202 F4 / EN 558 Series 14), making it significantly more compact than standard gate valves of the same size and pressure rating
Overview
Key Design & Operating Characteristics:
Compact and Space-Saving: The reduced face-to-face length is the defining feature, allowing installation where axial space is limited, such as in engine rooms or pump manifolds.
Non-Rising Stem (NRS) Option: Many marine short pattern valves use an NRS design, where the stem does not extend during operation. This is crucial when there is limited overhead clearance.
Isolation Service: These valves are designed for on/off flow isolation and are not intended for throttling or flow regulation.
Position Indicator: A common feature is a visual open/closed position indicator, which is important for verifying valve status in critical systems like pump rooms and manifolds.
Typical Specification Parameters:
| Parameter | Typical Specification |
| Nominal Size (DN) | DN40 – DN600 (1.5" – 24") |
| Nominal Pressure (PN) | PN0.4, PN0.6, PN1.0, PN1.6 MPa; JIS 5K, 10K; ANSI Class 150 |
| Face-to-Face Standard | DIN 3202 F4 / EN 558 Series 14 (short pattern) |
| Flange Standard | DIN EN 1092-1, JIS B2220, ANSI B16.5, GB/T 569 (Type A) |
| Body Materials | Cast Iron, Ductile Iron, Cast Steel (WCB), Bronze, Nickel-Aluminum Bronze (C95800) |
| Trim Materials | Bronze (BC6), Stainless Steel (AISI 304/316), Rg5 trim |
| Design Standards | DIN EN 1171 / DIN 3352, JIS F7301-7410, JIS F7363, API 6D, ASME B16.34 |
| Applicable Media | Seawater, fresh water, fuel oil, lubricating oil, steam (≤120°C) |
| Temperature Range | -20°C to 120°C (Bronze); -29°C to 350°C (Cast Steel Hard Sealing) |
| Connection Type | Flanged (raised face) |
| Stem Type | Non-Rising Stem (NRS) or Rising Stem (RS) |
| Pressure Test | Shell: 1.5× PN; Seat: 1.1× PN (per JIS F7400 / GB/T13927) |
Additional Notes:
Certification: Marine valves often require classification society approval, such as CCS, ABS, DNV, LR, BV, or NK.
Variants: Some models offer features like a drain plug or an AISI 304 trim for enhanced corrosion resistance
