HTP-E Series Ultra-High Pressure Electric Bolt Tensioner Pumps
Engineering Overview & Structural Features
The HTP-E Series Ultra-High Pressure Electric Bolt Tensioner Pumps deliver genuine 1500 to 2500 Bar (150 - 250 MPa) performance directly from a double-stage high-pressure piston pump mechanism without requiring external pneumatic boosters or shop-air intensifiers. Powered by a high-efficiency 0.8 kW industrial brushless DC motor (220V), the HTP-E Series ensures whisper-quiet operation, rapid no-load stroke advance at 1.50 L/min, and high-precision target pressure holding via an integrated ±1.5% high-accuracy adjustable relief valve. Built within a rigid tubular frame on a 5.0 L lightweight aluminum reservoir, the entire system weighs just 21 to 25 kg, making it the premier choice for wind turbine nacelles, nuclear reactor vessels, and critical petrochemical flange tensioning.
BOOSTER-FREE DOUBLE-STAGE PISTON HEAD
Direct-drive double-stage piston mechanism generates ultra-high hydraulic pressure up to 2500 Bar continuously without external pneumatic air intensifiers, ensuring smooth pulsation-damped oil delivery directly to hydraulic bolt tensioners.
0.8 KW INDUSTRIAL BRUSHLESS DC MOTOR
High-torque 0.8 kW brushless motor eliminates carbon brush friction and wear, achieving whisper-quiet operation below 70 dB, low thermal rise, and maintenance-free continuous operation during heavy multi-stud tensioning routines.
±1.5% TARGET-LOCKING RELIEF REGULATION
Integrated micro-adjustable safety relief valve allows operators to preset target tensioning pressure with ±1.5% repeatability, preventing stud over-stretching and guaranteeing uniform clamp pre-load across critical bolted connections.
ZERO-LEAK POWER-OFF PRESSURE HOLDING
High-integrity poppet check valve ensures absolute zero pressure drop when motor power cuts off, allowing technicians to verify elongation, run down hex collars, or inspect gasket compression with complete peace of mind.
WIND TURBINE FOUNDATION & BLADE BOLTING
Lightweight 21-25 kg aluminum form factor facilitates crane hoisting into nacelles and tower bases for high-cycle foundation anchor stud and slew ring pre-tensioning.
NUCLEAR & STEAM TURBINE CASING SEALS
Electric single-phase 220V operation delivers clean, zero-exhaust hydraulic pressure inside sensitive turbine halls where compressed air is unavailable or prohibited.
HIGH-PRESSURE SUBSEA & REFINERY FLANGES
Simultaneous multi-tool manifold connection pairs seamlessly with 1500-2500 Bar topside tensioners for leak-free ANSI/API high-pressure pipeline joints.
OEM Cross-Reference & Dimensional Interchangeability
Ultra-high pressure electric tensioner pumps delivering 1500 to 2500 Bar (150-250 MPa) direct-piston output without external boosters. Engineered with 0.8 kW brushless motors, ±1.5% precision relief calibration, and 5.0 L lightweight aluminum reservoirs for high-torque critical bolting. 1500 - 2500 Bar Electric Tensioner.
Enerpac®, SPX Flow®, Power Team®, Simplex®, Hytorc®, Holmatro® and other brand names are registered trademarks of their respective owners. HydraStark is an independent manufacturer and is not affiliated with, authorized or endorsed by these companies. OEM model numbers are listed for dimensional and specification reference only; please verify fit with our engineers before ordering.
RATED PRESSURE
1500 - 2500 BAR BOOSTER-FREE
PUMP MECHANISM
Booster-Free Double-Stage Piston Design
MOTOR POWER
0.8 kW Brushless DC Motor (220V Single-Phase)
Real Product Details & Build Quality
Specifications
Model | Max Pressure Bar | Flow @ No Load L/min | Rated Flow L/min | Oil Capacity L | Oil Port Thread | Quick Coupling | Weight kg |
|---|---|---|---|---|---|---|---|
| HTP-E-1500 | 1500 | 1.5 | 0.15 | 5 | G1/4 | CEJN: 116 | 21 |
| HTP-E-2000 | 2000 | 1.5 | 0.12 | 5 | G1/4 | CEJN: 125 | 21 |
| HTP-E-2500 | 2500 | 1.5 | 0.10 | 5 | G1/4 | CEJN: 125 | 25 |
Required System Components
Frequently Asked Questions
Q1How does the HydraStark HTP-E compare with the Enerpac ZUTP?
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How does the HydraStark HTP-E compare with the Enerpac ZUTP?
The HydraStark HTP-E range (HTP-E Series Ultra-High Pressure Electric Bolt Tensioner Pumps) is positioned as an alternative to the Enerpac ZUTP (OEM part numbers such as ZUTP-1500, ZUTP-2500). Enerpac is a registered trademark of its owner; the reference is provided for dimensional and technical comparison only. Mounting dimensions, ratings and interfaces are listed in the specification table on this page — please confirm them against your existing equipment, or send us your OEM part number and our engineers will check compatibility before you order.
Q2What are the key specifications of the HTP-E?
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What are the key specifications of the HTP-E?
Rated Pressure: 1500 - 2500 Bar Booster-free; Pump Mechanism: Booster-Free Double-Stage Piston Design; Motor Power: 0.8 kW Brushless DC Motor (220V Single-Phase); No-load Advance Flow: 1.50 L/min Rapid Tensioner Stroke Extension; High-pressure Flow: 0.10 - 0.15 L/min at Maximum 2500 Bar Output. Full specifications and dimensions are given in the specification table below.
Q3Which models are available in the HTP-E series?
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Which models are available in the HTP-E series?
The specification table lists 3 models: HTP-E-1500, HTP-E-2000, HTP-E-2500. For non-standard requirements, please describe them in the inquiry form.
Q4How is the HTP-E tested before shipping?
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How is the HTP-E tested before shipping?
Each unit is tested at 125% of its rated pressure before shipping (2,500 Bar rated, 3,125 Bar test pressure).
Q5What are the lead time, warranty and shipping options for the HTP-E?
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What are the lead time, warranty and shipping options for the HTP-E?
Lead time is typically 2–3 business days when the model is in stock and 7–35 business days otherwise. Warranty is 12 months after receipt of goods. Shipping is available by sea freight, air freight or international express (DHL, FedEx, UPS). Send your requirements through the inquiry form for an exact quotation and delivery date.