Sub-sea bolt tensioner – metric – STU

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Sub-sea bolt tensioner – metric – STU

Single acting design with manual piston retraction. Manufactured from high grade alloy steel with added corrosion protection. Extra-long piston stroke on all models, to save valuable diver time subsea. Simple two piece design for easy operation by divers subsea. Visible maximum stroke indicator to warn operator against piston over extension. Safety over stroke device to protect operator from injury. Self-energising seals for improved performance and longevity of use at high pressure. Dual quick connect inlet and outlet couplings for easy multiple tensioner connection. Designed to fit most sizes of ANSI and API flanges and some Compact flanges. Interchangeable quick fit pullers, to cover multiple bolt sizes, for each STU model, are available as accessories for even greater versatility.

Bolt sizes from M24 to M90 diameterCapacities from 256 to 2483 kNMaximum working pressure 1500 bar

Product card

Technical specifications

<th colspan="2"Capacity

Model number	Quick Fit Pullers	Bolt thread size	Effective area	Stroke	Weight	Tommy bar	Dimensions [mm]
			[kN]	[t]	[cm2]	[mm]	[kg]		A	B	C	D	E	F
STU1-24	QFP1-24	M24x3	256	26.1	17.1	20	3.4	TTB06	82	22	119	119	140	61
STU1-27	QFP1-27	M27x3	256	26.1	17.1	20	3.4	TTB06	82	22	119	119	140	64
STU2-30	QFP2-30	M30x3.5	430	43.9	28.7	30	6.0	TTB08	102	30	140	140	164	73
STU2-33	QFP2-33	M33x3.5	430	43.9	28.7	30	6.0	TTB08	102	30	140	140	164	75
STU2-36	QFP2-36	M36x4	430	43.9	28.7	30	6.0	TTB10	102	30	140	140	164	78
STU3-39	QFP3-39	M39x4	553	56.4	36.9	30	7.5	TTB10	114	35	142	142	169	82
STU3-42	QFP3-42	M42x4.5	553	56.4	36.9	30	7.5	TTB10	114	35	142	142	169	85
STU4-45	QFP4-45	M45x4.5	756	77.1	50.4	30	9.8	TTB10	128	41	151	151	181	94
STU4-48	QFP4-48	M48x5	756	77.1	50.4	30	9.8	TTB12	128	41	151	151	181	98
STU5-52	QFP5-52	M52x5	1168	119.1	77.9	30	14.5	TTB12	150	48	164	164	202	112
STU5-56	QFP5-56	M56x5.5	1168	119.1	77.9	30	14.5	TTB14	150	48	164	164	202	116
STU6-60	QFP6-60	M60x5.5	1649	168.1	109.9	30	22.8	TTB14	176	60	183	183	231	136
STU6-64	QFP6-64	M64x6	1649	168.1	109.9	30	22.8	TTB16	176	60	183	183	231	136
STU6-68	QFP6-68	M68x6	1649	168.1	109.9	30	22.8	TTB16	176	60	183	183	231	136
STU6-72	QFP6-72	M72x6	1649	168.1	109.9	30	22.8	TTB16	176	60	183	183	231	141
STU7-76	QFP7-76	M76x6	2483	253.2	165.6	30	35.6	TTB16	215	89	215	215	260	164
STU7-80	QFP7-80	M80x6	2483	253.2	165.6	30	35.6	TTB16	215	89	215	215	260	164
STU7-85	QFP7-85	M85x6	2483	253.2	165.6	30	35.6	TTB16	215	89	215	215	260	175
STU7-90	QFP7-90	M90x6	2483	253.2	165.6	30	35.6	TTB16	215	89	215	215	260	175

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Sub-sea bolt tensioner – metric – STU