Piston Seal

K40 - Piston Seal

General Features
Technicial Specifications

KASTAŞ NO	D (H8)	d (h11)	B (-0/+0,2)	d1 min.	n
K40-014 PU	14	8	6	10	2
K40-036 PU	36	27	6	32	3
K40-040 PU	40	25	11	35	4
K40-045 PU	45	30	11	40	4
K40-045/1 PU	45	30	9,5	40	4
K40-050 PU	50	35	11	45	4
K40-050/1 PU	50	35	9,5	45	4
K40-055 PU	55	40	11	50	4
K40-055/1 PU	55	40	9,5	50	4
K40-060 PU	60	45	11	55	4
K40-060/1 PU	60	45	9,5	55	4
K40-063 PU	63	48	10	58	4
K40-063/1 PU	63	50	10	60	4
K40-063/2 PU	63	48	9,5	58	4
K40-065 PU	65	50	11	60	4
K40-070 PU	70	50	13	64	5
K40-070/2 PU	70	55	10	65	4
K40-070/3 PU	70	50	16,5	64	5
K40-075 PU	75	55	13	69	5
K40-080 PU	80	60	13	74	5
K40-080/1 PU	80	60	12,5	74	5
K40-085 PU	85	70	9,3	79	5
K40-090 PU	90	70	13	84	5
K40-100 PU	100	80	13	94	5
K40-100/1 PU	100	88	8,5	96	4
K40-110 PU	110	90	13	104	5
K40-120 PU	120	100	13	114	6,5
K40-125 PU	125	100	16,2	119	6,5
K40-140 PU	140	115	15	134	6,5
K40-140/1 PU	140	120	12,5	134	6,5
K40-150 PU	150	120	19	144	8
K40-170 PU	170	150	12,5	164	6,5
K40-180 PU	180	150	19	174	8
K40-220 PU	220	190	17	212	8
K40-240 PU	240	210	17	232	8

K40 is a two piece single acting piston seal which consists of asymmetrical profile with pressure relieving grooves and a thermoplastic back-up ring.

PRODUCT ADVANTAGES
• Superior static and dynamic sealing effect
• Improved sealing gap due to the active back-up ring
• Relief grooves against dynamic pressure
• Easy assembly into the closed groove
• Simple groove design
• Highly wear resistant

APPLICATION
Heavy duty cylinders , scrap cutters and hydraulic jacks.

MATERIAL		CODE
PU	92 SHORE A	PU^₉₄₀₁
POM		PM^₉₉₀₁

OPERATING CONDITIONS

MEDIA

Mineral oils(DIN 51524)

HFA and HFB

HFC

TEMPERATURE

-30°C +100°C

+5°C +50°C

-30°C +40°C

PRESSURE

≤400 Bar

SPEED

≤0.5 m/sn

Note: The above data are maximum values and cannot be used at the same time.

SURFACE ROUGHNESS	Ra	Rmax
Sliding Surface ØD	≤0.4 μm	≤3.2 μm
Groove Base Ød	≤1.6 μm	≤10 μm
Groove Flanks B	≤3.2 μm	≤16 μm
Note: It is recommended to have 50% to 90% of the working surface material contact area value.
INSTALLATION Easily assembled into one piece piston. It is very important that the assembly tools must be of soft material and have no sharp edges. Before installation all individual parts of the seal must be oiled with system oil. NOTESThe permissible sealing gap values of K40 piston seal is given in the below table.

PERMISSIBLE SEALING GAP

Pressure (Bar)	Smax (mm)
100	1.0
150	0.8
250	0.7
400	0.6

Note: The largest sealing gap value occurring on the non-pressurized side of the seal does have a vital importance for the function of the seal and in this respect it is quite important to use the S value lower than the above indicated numbers.