Bolt Tensioners

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The Spring Return design dramatically increases productivity and safety on the job site when compared to older technology manual return tensioners.
• Piston overstroke prevention.
• Piston stroke indication.
• Compatible with MRT Tensioner range.
• Unique quick release bridge adaptation.
• Piston/cylinder misalignment compensation.
• Bolt coverage from 3/4" to 4" (20 - 115 mm) with just 8 tools.
• Designed to fit BS1560/ANSI B16.5/API flanges.
• Fully enclosed load cell design eliminates entry of debris into piston retraction mechanism.
• Piston over-stroke eliminator to prevent over stroking and blowing a seal.
• Twin hydraulic couplings for multiple tool connections.
• Requires stud to protrude above nut by 1 x bolt diameter.
• Application specific tooling available. Contact factory for details.
• 10 mm piston stroke.
Max tool pressure: 1,500 bar (21,750 psi)
Bolt protrusion above nut: 1 x bolt diameter (minimum)

Model	Stud Diameter (Imperial)	Stud Diameter (Metric)	Tool Load (kN)	Weight (kg)
SRT0	3/4" to 7/8"	M20 to M22	160	1.4
SRT1	1" to 1-1/8"	M24 to M27	280	2.7
SRT2	1" to 1-3/8"	M24 to M36	450	4.1
SRT3	1-1/4" to 1-5/8"	M33 to M42	660	5.4
SRT4	1-1/2" to 2"	M39 to M48	1000	8.4
SRT5	2" to 2-3/4"	M52 to M70	1500	13.8
SRT6	2-3/4" to 3-1/2"	M72 to M90	2500	23
SRT7	3-1/2" to 4"	M90 to M100	3200	32
SRT8	4” to 4-1/2"	M105 to M115	4100	45

Dimensions (mm)
Model	A	B	C	D (Imperial Bolts)	D (Metric Bolts)	E	F	G
SRT0	93	63	136	142	36	25	50.8	49.8
SRT1	93	63	142	144	36	25	53.6	51
	117	68	175	175	38	28	58.8	56.5
	117	68	-	178	38	28	-	58.7
SRT2	120	72	181	-	41	31	68.3	44.5
	117	75	175	175	38	30	65.2	64.5
	117	75	-	178	38	30	-	66
	120	80	181	184	41	30	67.6	67.6
	123	84	188	190	44	35	72.3	71.9
SRT3	126	89	195	196	47	38	78	77
	123	88	190	192	44	35	75.9	76.5
	126	96	197	198	47	38	81.1	80.8
	130	96	203	204	51	42	83.8	83.6
SRT4	133	105	209	211	54	41	91	91
	132	112	211	212	51	42	91.8	91.6
	135	114	217	218	54	45	95.6	95.5
	139	118	223	225	57	52	100	100
	142	114	230	231	60	51	101.1	101.3
SRT5	145	120	236	-	63	52	106.8	-
	148	120	246	248	63	52	114	115
	154	138	259	258	70	58	121.3	119.1
	161	138	-	262	70	58	-	122
	161	153	272	273	76	63	134.3	132.3
	161	153	-	283	76	63	-	135
	161	153	-	287	76	63	-	135.2
SRT6	167	156	284	283	81	70	141.3	-
	167	157	294	297	82	72	145.4	146.5
	174	182	307	308	89	80	159.8	155.5
	174	182	-	312	89	80	-	158.4
	180	190	320	323	95	84	169	165
SRT7	186	205	332	334	101	88	182	178.6
	186	200	339	341	101	88	179.8	176.1
	186	200	-	346	101	88	-	178.9
	192	200	352	356	107	94	185.3	184.7
SRT8	199	210	364	-	114	114	186	-
	199	210	374	378	114	114	196	195
	199	210	-	383	114	114	-	197
	205	224	387	394	120	114	208	208

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Bolt Tensioners

Model

Stud Diameter (Imperial)

Stud Diameter (Metric)

Tool Load (kN)

Weight (kg)

SRT0

3/4" to 7/8"

M20 to M22

160

1.4

SRT1

1" to 1-1/8"

M24 to M27

280

2.7

SRT2

1" to 1-3/8"

M24 to M36

450

4.1

SRT3

1-1/4" to 1-5/8"

M33 to M42

660

5.4

SRT4

1-1/2" to 2"

M39 to M48

1000

8.4

SRT5

2" to 2-3/4"

M52 to M70

1500

13.8

SRT6

2-3/4" to 3-1/2"

M72 to M90

2500

23

SRT7

3-1/2" to 4"

M90 to M100

3200

32

SRT8

4” to 4-1/2"

M105 to M115

4100

45

Dimensions (mm)

Model

­A

B

C

D(Imperial Bolts)

D(Metric Bolts)

E

F

G

SRT0

93

63

136

142

36

25

50.8

49.8

SRT1

93

63

142

144

36

25

53.6

51

117

A

D
(Imperial Bolts)

D
(Metric Bolts)