Page 397 - Vetus

LOCKS AND STAYS

Gas struts
There are many applications on board where the assistance of a gas strut will reduce the effort required. For example, heavy
deck hatches or locker doors. VETUS gas struts are specifically designed for marine use. All external parts are made of stain-
less steel (AISI 316) or synthetic materials and the special seals guarantee long service life. When fitted vertically, make sure
that the piston rod is pointing downward.

These gas-filled cylinders are supplied complete with fixings.
In order to calculate the maximum admissible weight
which can be supported, the following data is required:
F = Force of the gas strut in N/m (see table)
G = Weight of the object to be lifted in N
W = Width of the object to be lifted in mm

The calculation goes as follows:
G x ½W
Force in N/m = 1000

Example:
The weight (G) of a hatch is 11 kg (≈110 N). The width (W) of the
hatch is 600 mm. This means that:
GASSP..
110 x 300 = 33 N/m is needed to hold the hatch open.
1000
In the table we find that GASSP44 delivers 28.8 N/m, which means Force Stroke S Force (F) in Length L Length L+S
that an additional 4,3 N/m will have to be applied by the user. Type in N in mm N/m in mm in mm
GASSP25 180 (40.5) 74 (2 7 /8”) 13,3 180 (7 1 /8”) 254 (10”)
In the case of 2 gas struts GASSP38, 18,9 x 2 = 37,8 N/m is delivered GASSP30 135 (30.35) 85 (3 3 /8”) 11,5 220 (8 5 /8”) 305 (12”)
by the struts. In this case the user will have to push the hatch down GASSP38 135 (30.35) 140 (5 1 /2”) 18,9 240 (9 1 /2”) 380 (15”)
with a force of 4,8 N/m.
GASSP44 180 (40.5) 160 (6 1 /4”) 28,8 280 (11”) 440 (17 3 /8”)
GASSP51 270 (60.7) 205 (8 1 /16”) 55,3 305 (12”) 510 (20”)

ACCESSORIES
Marine binoculars
These binoculars are specially designed for marine applications and the materials are carefully selected for their resistance to
wind and weather. The lens coatings are specifically chosen for use on the water, where bright light, glare and UV radiation
should be taken into account.
Robust, lightweight binoculars High-quality, waterproof binoculars

The durable, lightweight housing and the relatively The BAK4 prisms create the sharpest and clearest images
compact size make the BINO1 the ideal binoculars possible in a binocular in this price range. All lenses are
to have at hand at all times. The BK7 prisms and multi-coated for long lasting protection. The superior
multi-coated lenses deliver very sharp images and the prisms combined with large lens diameters make these
housing is fitted with a non-slip grip. binoculars very suitable for use in difficult conditions such
as twilight or bad weather. The binoculars have a robust
• BK7 prisms soft touch casing and ergonomic design making them easy
• Magnification: 7x; Lens Ø 1 /32” - 50 mm and stable to hold.
31
• Water repellent
• Fixed focus and central variable focus • Superior quality prisms (BAK4) for the brightest images
• Flexible eyecups for use with (sun) glasses • Magnification: 7x; Lens Ø 1 /32”- 50 mm
31
• Non-slip grip • Waterproof and fog-free (filled with nitrogen)
• Robust housing • Fixed focus and central variable focus
• Includes bag and strap and caps • Flexible eyecups for use with (sun) glasses
• Ergonomic design and non-slip grip
• Includes bag and floatation strap
and caps

BINO1 BINO2

BK7 and BAK4 refer to the type of glass used for the prisms. The prisms bend the light image inside the binoculars.
BK7 is borosilicate and BAK4 barium crown glass. The type of glass affects the sharpness and clarity of the image,
BAK4 produces the best images with negligible distortion, whilst BK7 can result in a very slightly distorted image.
Creators of Boat Systems 397