Coliter ® Non Rising Stem Soft Sealing Gate Valve – PN10/16, ≤80°C, Zero Leakage for Water & Industrial Pipelines
Z45X Non Rising Stem Soft Sealing Gate Valve – Compact, Full-Port Gate Valve with EPDM/NBR Elastomer Seal
The Coliter® Z45X Non Rising Stem Soft Sealing Gate Valve is a high-reliability isolation valve designed for on/off control in water supply, sewage, HVAC, fire protection, and light industrial fluid systems. Featuring a non-rising (concealed) stem design, it saves vertical installation space—making it ideal for underground vaults, trenches, or confined areas. The valve utilizes a resilient EPDM or NBR rubber-coated wedge gate that compresses against a precision-machined seat to achieve bubble-tight, zero-leakage shut-off. Constructed with a robust body made of grey cast iron, ductile iron, or cast steel (optional), and a stainless steel stem (45#, 1Cr13, 304, or 316), it ensures durability and smooth operation. Rated for PN10/16 (1.0–1.6 MPa) and suitable for media temperatures up to 80°C, the Z45X complies with GB/T 12234, GB/T 17241.6, and GB/T 13927 standards. It features a flat-bottom valve seat to prevent debris accumulation, full-port flow for minimal pressure drop, and flanged end connections for secure pipeline integration. Available in sizes from DN50 to DN600, it supports manual, electric, pneumatic, or hydraulic actuation—delivering long service life, low operating torque, and maintenance-free performance in demanding applications.
Installation diagram
Product Description
| DN | L | HA | HC | D | Z-Φd | |
| 1.0/1.6MPa | 1.0MPa | 1.6MPa | ||||
| 50 | 178 | 313 | 340 | 165 | 4-19 | 4-19 |
| 65 | 190 | 332 | 370 | 185 | 4-19 | 4-19 |
| 80 | 203 | 372 | 410 | 200 | 8-19 | 8-19 |
| 100 | 229 | 424 | 450 | 220 | 8-19 | 8-19 |
| 125 | 254 | 497 | 480 | 250 | 8-19 | 8-19 |
| 150 | 267 | 562 | 550 | 285 | 8-23 | 8-23 |
| 200 | 292 | 680 | 630 | 340 | 8-23 | 12-23 |
| 250 | 330 | 837 | 750 | 405 | 12-23 | 12-28 |
| 300 | 356 | 948 | 820 | 460 | 12-23 | 12-28 |
| 350 | 381 | 1010 | 980 | 520 | 16-28 | 16-28 |
| 400 | 406 | 1220 | 1010 | 580 | 16-28 | 16-28 |
| 450 | 432 | 1280 | 1270 | 640 | 20-28 | 20-31 |
| 500 | 457 | 1480 | 1270 | 715 | 20-28 | 20-34 |
| 600 | 508 | 1665 | 1390 | 840 | 20-31 | 20-37 |
The Z45X non rising stem soft sealing gate valve is composed of parts such as valve body, valvecover, valve stem, valve stem nut, gate plate, etc. This valve utilizes the compensation effect of elasticdeformation generated by the elastic gate to achieve good sealing effect.It has significant advantagessuch as lightweight opening and closing, reliable sealing, good elastic memory, and long service life, Itadopts full bore, non rising stem operation,flange bolt connection, flat bottom valve seat, and no debrisprecipitation. It is widely used in tap water, sewage, construction, petroleum, chemical, food,medicine,textile, electricity, shipbuilding, metallurgy, etc Used as a regulating and intercepting device on fluidpipelines such as energy systems.
Main performance specification
Nominal pressure: 1.0~2.5MPa
Nominal diameter: 50~600mm
Applicable media: Water, oil, gas, etc
Working temperature: ≤80℃
Flange standard: GB/T17241.6 GB9113
Test standard GB13927 API598
Materials of main parts
Valve body: Grey cast iron, ductile iron, cast steel
Ram: Ductile iron coated with EPDM or NBR
Hexagon socket head bolt: Carbonization treatment
Seal ring: Nitrile rubber
Valve cover: Grey cast iron, ductile iron, cast steel
Stem: Stainless steel(45#, 1Cr13, 304, 416, 316)
O-ring: Nitrile rubber
Thrust bearing: Tin bronze
Bolt: Stainless steel
Gland: Ductile iron, cast steel
Dust vocer: Nitrile rubber
Hand wheel (transmission cap): Cast iron, ductile iron
Transmission mode: manual, electric, pneumatic and hydraulic.
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Faq - Frequent questions
Introduction to Soft sealing gate valve
Coliter®’s soft sealing gate valves deliver bubble-tight shut-off in water supply, HVAC, and municipal pipelines with zero leakage and low torque operation. The series includes the Z41X rising stem type, Z45X non-rising stem type, compact Z15X threaded-end model, and secure DZ45X/DZ15X lockable variants—all featuring a resilient rubber or EPDM wedge that seals against a precision-machined brass or ductile iron seat. Rated at PN16 (1.6 MPa) and suitable for temperatures up to 80°C, these valves comply with GB/T 12234 and offer full-port flow with minimal pressure drop. Ideal for building mains, pump stations, and irrigation networks where reliable isolation and long service life are critical.
